My question might seem dumb but I can’t seem to find the answer: How can I edit certain values on an xml file that already exists?
I want to edit all the attributes values with values coming from an excel sheet. Is that possible?
Thanks!My question might seem dumb but I can’t seem to find the answer: How can I edit certain values on an xml file that already exists?
I want to edit all the attributes values with values coming from an excel sheet. Is that possible?
Thanks! My question might seem dumb but I can’t seem to find the answer: How can I edit certain values on an xml file that already exists?
I want to edit all the attributes values with values coming from an excel sheet. Is that possible?
Thanks! xml, xmledit MATLAB Answers — New Questions

​

Can I communicate with the host/master via serial port (MODBUS ASCII/RTU) using MATLAB on the slave computer, i.e. I need to wait for a request from the host/master, receive it when it comes and send back the requested data to the host. I found how this can implemented for MODBUS TCP/IP, but I did not find how to implement that for MODBUS ASCII/RTU (RS232, RS485). All MATLAB functions for serial port communication seem to be for the case when the code runs on the host computer. My MATLAB code runs on the slave device (processor/computer which controls the analytical instrument) and I need it to send the data when requested to the host (SCADA).Can I communicate with the host/master via serial port (MODBUS ASCII/RTU) using MATLAB on the slave computer, i.e. I need to wait for a request from the host/master, receive it when it comes and send back the requested data to the host. I found how this can implemented for MODBUS TCP/IP, but I did not find how to implement that for MODBUS ASCII/RTU (RS232, RS485). All MATLAB functions for serial port communication seem to be for the case when the code runs on the host computer. My MATLAB code runs on the slave device (processor/computer which controls the analytical instrument) and I need it to send the data when requested to the host (SCADA). Can I communicate with the host/master via serial port (MODBUS ASCII/RTU) using MATLAB on the slave computer, i.e. I need to wait for a request from the host/master, receive it when it comes and send back the requested data to the host. I found how this can implemented for MODBUS TCP/IP, but I did not find how to implement that for MODBUS ASCII/RTU (RS232, RS485). All MATLAB functions for serial port communication seem to be for the case when the code runs on the host computer. My MATLAB code runs on the slave device (processor/computer which controls the analytical instrument) and I need it to send the data when requested to the host (SCADA). serial port, modbus, modbus ascii, modbus rtu, modbus slave, modbus host, rs485, rs232 MATLAB Answers — New Questions

​

I want to use ‘system’ to open another software in cmd as well as forming a java socket between them to allow exchanging datas for calculation, as shown in the code below
% command to execute in cmd to form socket
commandString = strcat(‘"’, this.FreeFlyerPath, ‘FreeFlyer.exe"’, …
‘ -r -mp "’, this.MissionPlanPath, ‘sample.MissionPlan"’, …
sprintf(‘ -ui %d -ui %d -ui %s &’, portNum(1), portNum(2), this.terminationCode));

system( commandString );
%
%
%
%
% some algorithms
%
%
%

% how to close the cmd?
However, the function has to be looped multiple times, that means the cmd windows keep popping out like a virus without exiting. I tried system(‘exit’) and it does not work. May I know the correct way to close the cmd window after executed the function?I want to use ‘system’ to open another software in cmd as well as forming a java socket between them to allow exchanging datas for calculation, as shown in the code below
% command to execute in cmd to form socket
commandString = strcat(‘"’, this.FreeFlyerPath, ‘FreeFlyer.exe"’, …
‘ -r -mp "’, this.MissionPlanPath, ‘sample.MissionPlan"’, …
sprintf(‘ -ui %d -ui %d -ui %s &’, portNum(1), portNum(2), this.terminationCode));

system( commandString );
%
%
%
%
% some algorithms
%
%
%

% how to close the cmd?
However, the function has to be looped multiple times, that means the cmd windows keep popping out like a virus without exiting. I tried system(‘exit’) and it does not work. May I know the correct way to close the cmd window after executed the function? I want to use ‘system’ to open another software in cmd as well as forming a java socket between them to allow exchanging datas for calculation, as shown in the code below
% command to execute in cmd to form socket
commandString = strcat(‘"’, this.FreeFlyerPath, ‘FreeFlyer.exe"’, …
‘ -r -mp "’, this.MissionPlanPath, ‘sample.MissionPlan"’, …
sprintf(‘ -ui %d -ui %d -ui %s &’, portNum(1), portNum(2), this.terminationCode));

system( commandString );
%
%
%
%
% some algorithms
%
%
%

% how to close the cmd?
However, the function has to be looped multiple times, that means the cmd windows keep popping out like a virus without exiting. I tried system(‘exit’) and it does not work. May I know the correct way to close the cmd window after executed the function? system, cmd, exit MATLAB Answers — New Questions

​

I have this warnings in matlab
Warning: Parameter object’s DataType property has been set while its Value is not double precision. Converting Value to real-world value (double precision).

I use .m file when declare parameter
and delare like this
Y.Value = [fi([0,10,10,0,0,0,0,0,0,0], 1, 16, 0.01, 0)];
When I enterend Y Value in command Window say like this
Parameter with properties:

Value: [0 10 10 0 0 0 0 0 0 0]
CoderInfo: [1×1 Simulink.CoderInfo]
Description: ‘-‘
DataType: ‘fixdt(0,16,0.01,0)’
Min: []
Max: []
Unit: ”
Complexity: ‘real’
Dimensions: [1 10]

Why this warning happens?I have this warnings in matlab
Warning: Parameter object’s DataType property has been set while its Value is not double precision. Converting Value to real-world value (double precision).

I use .m file when declare parameter
and delare like this
Y.Value = [fi([0,10,10,0,0,0,0,0,0,0], 1, 16, 0.01, 0)];
When I enterend Y Value in command Window say like this
Parameter with properties:

Value: [0 10 10 0 0 0 0 0 0 0]
CoderInfo: [1×1 Simulink.CoderInfo]
Description: ‘-‘
DataType: ‘fixdt(0,16,0.01,0)’
Min: []
Max: []
Unit: ”
Complexity: ‘real’
Dimensions: [1 10]

Why this warning happens? I have this warnings in matlab
Warning: Parameter object’s DataType property has been set while its Value is not double precision. Converting Value to real-world value (double precision).

I use .m file when declare parameter
and delare like this
Y.Value = [fi([0,10,10,0,0,0,0,0,0,0], 1, 16, 0.01, 0)];
When I enterend Y Value in command Window say like this
Parameter with properties:

Value: [0 10 10 0 0 0 0 0 0 0]
CoderInfo: [1×1 Simulink.CoderInfo]
Description: ‘-‘
DataType: ‘fixdt(0,16,0.01,0)’
Min: []
Max: []
Unit: ”
Complexity: ‘real’
Dimensions: [1 10]

Why this warning happens? simulink, matlab MATLAB Answers — New Questions

​

Problem Description:
I am working on a MATLAB project involving the Satellite Communications Toolbox. My script uses the accessIntervals function to compute access intervals for satellites and ground stations. However, I consistently encounter the following error:
sql
Copy code
Subscripting into a table using one subscript (as in t(i)) is not supported. Specify a row subscript and a variable subscript, as in t(rows,vars). To select variables, use t(:,i) or for one variable t.(i). To select rows, use t(i,:).

Steps to Reproduce:
I created a satellite scenario with the following setup:matlabCopy codestartTime = datetime(2024, 1, 6, 23, 23, 0);
stopTime = startTime + hours(24);
sampleTime = 60;
sc = satelliteScenario(startTime, stopTime, sampleTime);
sat = walkerDelta(sc, 570e3 + 6378.14e3, 70, 720, 36, 1, ArgumentOfLatitude=15, Name="Starlink");
gs = groundStation(sc, "Name", "Test Station", "Latitude", -35.40139, "Longitude", 148.98167);
ac = access(sat, gs);

I attempted to call accessIntervals for the Access object:matlabCopy codeTest = accessIntervals(ac(1));

The error occurs for all Access objects (ac).
Debugging Steps Taken:
I confirmed the Access objects (ac) are valid and properly initialized:matlabCopy codeAccess Object 1:
Access with properties:
Sequence: [1 721]
LineWidth: 3
LineColor: [0.3922 0.8314 0.0745]

The error persists for all Access objects.
Questions:
Is this a known issue with accessIntervals or the Satellite Communications Toolbox?
How can I resolve or work around this error to compute access intervals?
Are there alternative methods to compute satellite-ground station access intervals if accessIntervals cannot be used?
Environment: MatlabonlineProblem Description:
I am working on a MATLAB project involving the Satellite Communications Toolbox. My script uses the accessIntervals function to compute access intervals for satellites and ground stations. However, I consistently encounter the following error:
sql
Copy code
Subscripting into a table using one subscript (as in t(i)) is not supported. Specify a row subscript and a variable subscript, as in t(rows,vars). To select variables, use t(:,i) or for one variable t.(i). To select rows, use t(i,:).

Steps to Reproduce:
I created a satellite scenario with the following setup:matlabCopy codestartTime = datetime(2024, 1, 6, 23, 23, 0);
stopTime = startTime + hours(24);
sampleTime = 60;
sc = satelliteScenario(startTime, stopTime, sampleTime);
sat = walkerDelta(sc, 570e3 + 6378.14e3, 70, 720, 36, 1, ArgumentOfLatitude=15, Name="Starlink");
gs = groundStation(sc, "Name", "Test Station", "Latitude", -35.40139, "Longitude", 148.98167);
ac = access(sat, gs);

I attempted to call accessIntervals for the Access object:matlabCopy codeTest = accessIntervals(ac(1));

The error occurs for all Access objects (ac).
Debugging Steps Taken:
I confirmed the Access objects (ac) are valid and properly initialized:matlabCopy codeAccess Object 1:
Access with properties:
Sequence: [1 721]
LineWidth: 3
LineColor: [0.3922 0.8314 0.0745]

The error persists for all Access objects.
Questions:
Is this a known issue with accessIntervals or the Satellite Communications Toolbox?
How can I resolve or work around this error to compute access intervals?
Are there alternative methods to compute satellite-ground station access intervals if accessIntervals cannot be used?
Environment: Matlabonline Problem Description:
I am working on a MATLAB project involving the Satellite Communications Toolbox. My script uses the accessIntervals function to compute access intervals for satellites and ground stations. However, I consistently encounter the following error:
sql
Copy code
Subscripting into a table using one subscript (as in t(i)) is not supported. Specify a row subscript and a variable subscript, as in t(rows,vars). To select variables, use t(:,i) or for one variable t.(i). To select rows, use t(i,:).

Steps to Reproduce:
I created a satellite scenario with the following setup:matlabCopy codestartTime = datetime(2024, 1, 6, 23, 23, 0);
stopTime = startTime + hours(24);
sampleTime = 60;
sc = satelliteScenario(startTime, stopTime, sampleTime);
sat = walkerDelta(sc, 570e3 + 6378.14e3, 70, 720, 36, 1, ArgumentOfLatitude=15, Name="Starlink");
gs = groundStation(sc, "Name", "Test Station", "Latitude", -35.40139, "Longitude", 148.98167);
ac = access(sat, gs);

I attempted to call accessIntervals for the Access object:matlabCopy codeTest = accessIntervals(ac(1));

The error occurs for all Access objects (ac).
Debugging Steps Taken:
I confirmed the Access objects (ac) are valid and properly initialized:matlabCopy codeAccess Object 1:
Access with properties:
Sequence: [1 721]
LineWidth: 3
LineColor: [0.3922 0.8314 0.0745]

The error persists for all Access objects.
Questions:
Is this a known issue with accessIntervals or the Satellite Communications Toolbox?
How can I resolve or work around this error to compute access intervals?
Are there alternative methods to compute satellite-ground station access intervals if accessIntervals cannot be used?
Environment: Matlabonline accessintervals satellite toolbox satellite scenar, table indexing, error handling MATLAB Answers — New Questions

​

I am creating the mask for my simulink block and I need to add the Initiallization code to it. Unfortumatelly I can’t edit (add) code within the mask editor; it’s grayed and not editable, disabled.

How can I access this, and add the initialization code to it?

Thank you.I am creating the mask for my simulink block and I need to add the Initiallization code to it. Unfortumatelly I can’t edit (add) code within the mask editor; it’s grayed and not editable, disabled.

How can I access this, and add the initialization code to it?

Thank you. I am creating the mask for my simulink block and I need to add the Initiallization code to it. Unfortumatelly I can’t edit (add) code within the mask editor; it’s grayed and not editable, disabled.

How can I access this, and add the initialization code to it?

Thank you. initialization under mask editor MATLAB Answers — New Questions

​

clc;clear;close all

im= [0 0 0 0 0 0 0 0 0 0
0 0 1 1 1 1 1 1 0 0
0 0 1 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0];

cc=bwconncomp(im);

for i=1:cc.NumObjects
CC{i}=cc.PixelIdxList{i}
end

Size=zeros(1,cc.NumObjects);
for j=1:cc.NumObjects

Size(:,i)=size(cell2mat(CC(j)))
endclc;clear;close all

im= [0 0 0 0 0 0 0 0 0 0
0 0 1 1 1 1 1 1 0 0
0 0 1 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0];

cc=bwconncomp(im);

for i=1:cc.NumObjects
CC{i}=cc.PixelIdxList{i}
end

Size=zeros(1,cc.NumObjects);
for j=1:cc.NumObjects

Size(:,i)=size(cell2mat(CC(j)))
end clc;clear;close all

im= [0 0 0 0 0 0 0 0 0 0
0 0 1 1 1 1 1 1 0 0
0 0 1 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 1 1 1 1
0 0 0 0 0 0 0 0 0 0];

cc=bwconncomp(im);

for i=1:cc.NumObjects
CC{i}=cc.PixelIdxList{i}
end

Size=zeros(1,cc.NumObjects);
for j=1:cc.NumObjects

Size(:,i)=size(cell2mat(CC(j)))
end for loop MATLAB Answers — New Questions

​

The full error message reads "Error using trainnet (line 46)
The number of mini-batch queue outputs (2) must match the number of network inputs plus
the number of network outputs (4)."
I’m using an arrayDatastore to pass the predictors (x2) and the targets(x2) to the transformer model. Both predictors have 410 features, one of the targets has 410 features and the other target is a scalar function.
Code to generate the dummy predictor and target data is pasted below:
%——————————————————————–
% data generation for encoder
numObs = 10;
seqLen = vocabSize;
x_enc = randi([1,10],[seqLen,numObs]);
y_enc = zeros(numObs,1);
for i = 1:numObs
idx = x_enc(1:2,i);
y_enc(i,:) = sum(x_enc(idx,i));
end
x_enc = num2cell(x_enc’,2);
y_enc = num2cell(y_enc)’;
x_1 = x_enc;
y_2 = y_enc’;
% data generation for decoder
x_series = randi([1,10],[seqLen,numObs]);
y_series = sin(rand([seqLen,numObs]));
x_dec = x_series(:,1:end)’;
y_dec = y_series(:,1:end)’;
x_dec = num2cell(x_dec,2); x_2 = x_dec;
y_dec = num2cell(y_dec,2); y_1 = y_dec;
cell_data = {}; cell_data = [cell_data x_1 x_2 y_1 y_2];
dstrain = arrayDatastore(cell_data,’OutputType’,’same’);
%——————————————————————-
cell_data is of the form:
cell_data

cell_data =

10×4 cell array

{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[10]}
{1×410 double} {1×410 double} {1×410 double} {[13]}
{1×410 double} {1×410 double} {1×410 double} {[20]}
{1×410 double} {1×410 double} {1×410 double} {[ 7]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[17]}
{1×410 double} {1×410 double} {1×410 double} {[ 6]}
{1×410 double} {1×410 double} {1×410 double} {[11]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}

If I were to use readall(dstrain) to read the datastore, I get the same format as cell_data:
fds = readall(dstrain)

fds =

10×4 cell array

{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[10]}
{1×410 double} {1×410 double} {1×410 double} {[13]}
{1×410 double} {1×410 double} {1×410 double} {[20]}
{1×410 double} {1×410 double} {1×410 double} {[ 7]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[17]}
{1×410 double} {1×410 double} {1×410 double} {[ 6]}
{1×410 double} {1×410 double} {1×410 double} {[11]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}

Finally, if I use minibatchqueue to create a minibatch of datastore ‘dstrain’, I get:
mbq = minibatchqueue(dstrain)

mbq =

minibatchqueue with 4 outputs and properties:

Mini-batch creation:
MiniBatchSize: 10
PartialMiniBatch: ‘return’
MiniBatchFcn: ‘collate’
PreprocessingEnvironment: ‘serial’

Outputs:
OutputCast: {‘single’ ‘single’ ‘single’ ‘single’}
OutputAsDlarray: [1 1 1 1]
MiniBatchFormat: {” ” ” ”}
OutputEnvironment: {‘auto’ ‘auto’ ‘auto’ ‘auto’}

As you can see, there are four outputs for the minibatch, which appears to contradict the original error message that there are only two minibatchqueue outputs
Also to confirm, i double checked the transformer input output structure:
net

net =

dlnetwork with properties:

Layers: [64×1 nnet.cnn.layer.Layer]
Connections: [1714×2 table]
Learnables: [110×3 table]
State: [0×3 table]
InputNames: {‘in_enc’ ‘in_dec’}
OutputNames: {‘decoder_out’ ‘fc_13’}
Initialized: 1

View summary with summary.
which shows two inputs and two outputs.
Could someone point me to the mistake I’m making here (likely with the datastore format) – it seems that during batching, the model is only choosing two of the cell columns from cell_data/dstrain for the input and output, rather than all four and its not clear why…thanks in advance for your help!
CGThe full error message reads "Error using trainnet (line 46)
The number of mini-batch queue outputs (2) must match the number of network inputs plus
the number of network outputs (4)."
I’m using an arrayDatastore to pass the predictors (x2) and the targets(x2) to the transformer model. Both predictors have 410 features, one of the targets has 410 features and the other target is a scalar function.
Code to generate the dummy predictor and target data is pasted below:
%——————————————————————–
% data generation for encoder
numObs = 10;
seqLen = vocabSize;
x_enc = randi([1,10],[seqLen,numObs]);
y_enc = zeros(numObs,1);
for i = 1:numObs
idx = x_enc(1:2,i);
y_enc(i,:) = sum(x_enc(idx,i));
end
x_enc = num2cell(x_enc’,2);
y_enc = num2cell(y_enc)’;
x_1 = x_enc;
y_2 = y_enc’;
% data generation for decoder
x_series = randi([1,10],[seqLen,numObs]);
y_series = sin(rand([seqLen,numObs]));
x_dec = x_series(:,1:end)’;
y_dec = y_series(:,1:end)’;
x_dec = num2cell(x_dec,2); x_2 = x_dec;
y_dec = num2cell(y_dec,2); y_1 = y_dec;
cell_data = {}; cell_data = [cell_data x_1 x_2 y_1 y_2];
dstrain = arrayDatastore(cell_data,’OutputType’,’same’);
%——————————————————————-
cell_data is of the form:
cell_data

cell_data =

10×4 cell array

{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[10]}
{1×410 double} {1×410 double} {1×410 double} {[13]}
{1×410 double} {1×410 double} {1×410 double} {[20]}
{1×410 double} {1×410 double} {1×410 double} {[ 7]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[17]}
{1×410 double} {1×410 double} {1×410 double} {[ 6]}
{1×410 double} {1×410 double} {1×410 double} {[11]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}

If I were to use readall(dstrain) to read the datastore, I get the same format as cell_data:
fds = readall(dstrain)

fds =

10×4 cell array

{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[10]}
{1×410 double} {1×410 double} {1×410 double} {[13]}
{1×410 double} {1×410 double} {1×410 double} {[20]}
{1×410 double} {1×410 double} {1×410 double} {[ 7]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[17]}
{1×410 double} {1×410 double} {1×410 double} {[ 6]}
{1×410 double} {1×410 double} {1×410 double} {[11]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}

Finally, if I use minibatchqueue to create a minibatch of datastore ‘dstrain’, I get:
mbq = minibatchqueue(dstrain)

mbq =

minibatchqueue with 4 outputs and properties:

Mini-batch creation:
MiniBatchSize: 10
PartialMiniBatch: ‘return’
MiniBatchFcn: ‘collate’
PreprocessingEnvironment: ‘serial’

Outputs:
OutputCast: {‘single’ ‘single’ ‘single’ ‘single’}
OutputAsDlarray: [1 1 1 1]
MiniBatchFormat: {” ” ” ”}
OutputEnvironment: {‘auto’ ‘auto’ ‘auto’ ‘auto’}

As you can see, there are four outputs for the minibatch, which appears to contradict the original error message that there are only two minibatchqueue outputs
Also to confirm, i double checked the transformer input output structure:
net

net =

dlnetwork with properties:

Layers: [64×1 nnet.cnn.layer.Layer]
Connections: [1714×2 table]
Learnables: [110×3 table]
State: [0×3 table]
InputNames: {‘in_enc’ ‘in_dec’}
OutputNames: {‘decoder_out’ ‘fc_13’}
Initialized: 1

View summary with summary.
which shows two inputs and two outputs.
Could someone point me to the mistake I’m making here (likely with the datastore format) – it seems that during batching, the model is only choosing two of the cell columns from cell_data/dstrain for the input and output, rather than all four and its not clear why…thanks in advance for your help!
CG The full error message reads "Error using trainnet (line 46)
The number of mini-batch queue outputs (2) must match the number of network inputs plus
the number of network outputs (4)."
I’m using an arrayDatastore to pass the predictors (x2) and the targets(x2) to the transformer model. Both predictors have 410 features, one of the targets has 410 features and the other target is a scalar function.
Code to generate the dummy predictor and target data is pasted below:
%——————————————————————–
% data generation for encoder
numObs = 10;
seqLen = vocabSize;
x_enc = randi([1,10],[seqLen,numObs]);
y_enc = zeros(numObs,1);
for i = 1:numObs
idx = x_enc(1:2,i);
y_enc(i,:) = sum(x_enc(idx,i));
end
x_enc = num2cell(x_enc’,2);
y_enc = num2cell(y_enc)’;
x_1 = x_enc;
y_2 = y_enc’;
% data generation for decoder
x_series = randi([1,10],[seqLen,numObs]);
y_series = sin(rand([seqLen,numObs]));
x_dec = x_series(:,1:end)’;
y_dec = y_series(:,1:end)’;
x_dec = num2cell(x_dec,2); x_2 = x_dec;
y_dec = num2cell(y_dec,2); y_1 = y_dec;
cell_data = {}; cell_data = [cell_data x_1 x_2 y_1 y_2];
dstrain = arrayDatastore(cell_data,’OutputType’,’same’);
%——————————————————————-
cell_data is of the form:
cell_data

cell_data =

10×4 cell array

{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[10]}
{1×410 double} {1×410 double} {1×410 double} {[13]}
{1×410 double} {1×410 double} {1×410 double} {[20]}
{1×410 double} {1×410 double} {1×410 double} {[ 7]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[17]}
{1×410 double} {1×410 double} {1×410 double} {[ 6]}
{1×410 double} {1×410 double} {1×410 double} {[11]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}

If I were to use readall(dstrain) to read the datastore, I get the same format as cell_data:
fds = readall(dstrain)

fds =

10×4 cell array

{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[10]}
{1×410 double} {1×410 double} {1×410 double} {[13]}
{1×410 double} {1×410 double} {1×410 double} {[20]}
{1×410 double} {1×410 double} {1×410 double} {[ 7]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}
{1×410 double} {1×410 double} {1×410 double} {[17]}
{1×410 double} {1×410 double} {1×410 double} {[ 6]}
{1×410 double} {1×410 double} {1×410 double} {[11]}
{1×410 double} {1×410 double} {1×410 double} {[ 8]}

Finally, if I use minibatchqueue to create a minibatch of datastore ‘dstrain’, I get:
mbq = minibatchqueue(dstrain)

mbq =

minibatchqueue with 4 outputs and properties:

Mini-batch creation:
MiniBatchSize: 10
PartialMiniBatch: ‘return’
MiniBatchFcn: ‘collate’
PreprocessingEnvironment: ‘serial’

Outputs:
OutputCast: {‘single’ ‘single’ ‘single’ ‘single’}
OutputAsDlarray: [1 1 1 1]
MiniBatchFormat: {” ” ” ”}
OutputEnvironment: {‘auto’ ‘auto’ ‘auto’ ‘auto’}

As you can see, there are four outputs for the minibatch, which appears to contradict the original error message that there are only two minibatchqueue outputs
Also to confirm, i double checked the transformer input output structure:
net

net =

dlnetwork with properties:

Layers: [64×1 nnet.cnn.layer.Layer]
Connections: [1714×2 table]
Learnables: [110×3 table]
State: [0×3 table]
InputNames: {‘in_enc’ ‘in_dec’}
OutputNames: {‘decoder_out’ ‘fc_13’}
Initialized: 1

View summary with summary.
which shows two inputs and two outputs.
Could someone point me to the mistake I’m making here (likely with the datastore format) – it seems that during batching, the model is only choosing two of the cell columns from cell_data/dstrain for the input and output, rather than all four and its not clear why…thanks in advance for your help!
CG deep learning, minibatch, datastore MATLAB Answers — New Questions

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I’m trying to initialize a variable (MyHandle) that I want to be a handle pointing to some object but which can’t currently be assigned to said object. I have code that needs to behave differently depending on if MyHandle is assigned or not yet and I haven’t found a good way to test if MyHandle has been assigned to a valid object or not.
The function ‘isvalid’ seems like the right choice to test this, however, isvalid throws the error "Incorrect number or types of inputs or outputs for function isvalid." when run on MyHandle in its unassigned state. I’ve tried different ways to initialize it like "handle([])" and "[]", but they all return that same error.
I’ve found some bandaid solutions like initializing MyHandle to an instance of some arbitrary handle subclass and then deleting that initialized object, or assigning MyHandle to be a value of type double and then using "isnumeric" as my test function instead of "isvalid," but I was wondering if there is a more "correct" way to do it for the sake of best practices.
Below is a sample class that recreates the behavior described above. To restate my question in terms of the class below: Is there an initialization for MyHandle I can use in the properties block that will allow IsHandleAssigned to return false before the first time AssignHandle is run with a valid handle and return true afterwards? OR is there a different function besides isvalid that I should be using in IsHandleAssigned to achieve that behavior?
classdef ExampleClass < handle
properties
MyHandle %Will be a handle pointing to an object of an arbitrary class
% MyHandle = handle([]) < This initialization returns an error
% MyHandle = [] < This initialization returns an error
% MyHandle = 0 < This works if I replace ‘isvalid’ with ‘isnumeric’
% but that seems like poor practice to do since it obfuscates the
% purpose of MyHandle
end

methods
function obj = AssignHandle(obj,handleIn)
%This method assigns the handle of whatever class it happens to
%be to my property.
obj.MyHandle = handleIn;
end
function HandleIsAssigned = IsHandleAssigned(obj)
%This method tests whether or not my handle was assigned. Is
%there a better function than isvalid to use?
HandleIsAssigned = isvalid(obj.MyHandle);
end
end
endI’m trying to initialize a variable (MyHandle) that I want to be a handle pointing to some object but which can’t currently be assigned to said object. I have code that needs to behave differently depending on if MyHandle is assigned or not yet and I haven’t found a good way to test if MyHandle has been assigned to a valid object or not.
The function ‘isvalid’ seems like the right choice to test this, however, isvalid throws the error "Incorrect number or types of inputs or outputs for function isvalid." when run on MyHandle in its unassigned state. I’ve tried different ways to initialize it like "handle([])" and "[]", but they all return that same error.
I’ve found some bandaid solutions like initializing MyHandle to an instance of some arbitrary handle subclass and then deleting that initialized object, or assigning MyHandle to be a value of type double and then using "isnumeric" as my test function instead of "isvalid," but I was wondering if there is a more "correct" way to do it for the sake of best practices.
Below is a sample class that recreates the behavior described above. To restate my question in terms of the class below: Is there an initialization for MyHandle I can use in the properties block that will allow IsHandleAssigned to return false before the first time AssignHandle is run with a valid handle and return true afterwards? OR is there a different function besides isvalid that I should be using in IsHandleAssigned to achieve that behavior?
classdef ExampleClass < handle
properties
MyHandle %Will be a handle pointing to an object of an arbitrary class
% MyHandle = handle([]) < This initialization returns an error
% MyHandle = [] < This initialization returns an error
% MyHandle = 0 < This works if I replace ‘isvalid’ with ‘isnumeric’
% but that seems like poor practice to do since it obfuscates the
% purpose of MyHandle
end

methods
function obj = AssignHandle(obj,handleIn)
%This method assigns the handle of whatever class it happens to
%be to my property.
obj.MyHandle = handleIn;
end
function HandleIsAssigned = IsHandleAssigned(obj)
%This method tests whether or not my handle was assigned. Is
%there a better function than isvalid to use?
HandleIsAssigned = isvalid(obj.MyHandle);
end
end
end I’m trying to initialize a variable (MyHandle) that I want to be a handle pointing to some object but which can’t currently be assigned to said object. I have code that needs to behave differently depending on if MyHandle is assigned or not yet and I haven’t found a good way to test if MyHandle has been assigned to a valid object or not.
The function ‘isvalid’ seems like the right choice to test this, however, isvalid throws the error "Incorrect number or types of inputs or outputs for function isvalid." when run on MyHandle in its unassigned state. I’ve tried different ways to initialize it like "handle([])" and "[]", but they all return that same error.
I’ve found some bandaid solutions like initializing MyHandle to an instance of some arbitrary handle subclass and then deleting that initialized object, or assigning MyHandle to be a value of type double and then using "isnumeric" as my test function instead of "isvalid," but I was wondering if there is a more "correct" way to do it for the sake of best practices.
Below is a sample class that recreates the behavior described above. To restate my question in terms of the class below: Is there an initialization for MyHandle I can use in the properties block that will allow IsHandleAssigned to return false before the first time AssignHandle is run with a valid handle and return true afterwards? OR is there a different function besides isvalid that I should be using in IsHandleAssigned to achieve that behavior?
classdef ExampleClass < handle
properties
MyHandle %Will be a handle pointing to an object of an arbitrary class
% MyHandle = handle([]) < This initialization returns an error
% MyHandle = [] < This initialization returns an error
% MyHandle = 0 < This works if I replace ‘isvalid’ with ‘isnumeric’
% but that seems like poor practice to do since it obfuscates the
% purpose of MyHandle
end

methods
function obj = AssignHandle(obj,handleIn)
%This method assigns the handle of whatever class it happens to
%be to my property.
obj.MyHandle = handleIn;
end
function HandleIsAssigned = IsHandleAssigned(obj)
%This method tests whether or not my handle was assigned. Is
%there a better function than isvalid to use?
HandleIsAssigned = isvalid(obj.MyHandle);
end
end
end handles MATLAB Answers — New Questions

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Is there some sort of dual fuel engine model already accessible? If not, are there any sort of forums or videos i could use as help to build Such a model. My simulink skills are very basic at the moment.Is there some sort of dual fuel engine model already accessible? If not, are there any sort of forums or videos i could use as help to build Such a model. My simulink skills are very basic at the moment. Is there some sort of dual fuel engine model already accessible? If not, are there any sort of forums or videos i could use as help to build Such a model. My simulink skills are very basic at the moment. dual fuel, lpg, engine MATLAB Answers — New Questions

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