I’m trying to plot 4 different sets of data with a linear regression for each. I used the fitlm command to find hte linear regression. My problem arises with the plot all being the same color for each set of data, blue for the points and red for the regression line. I need them to be different colors for each data set for clarity sake.
data=readmatrix(‘straingage_caldata.csv’);
c1F=data(:,1);
c1V=data(:,2);
c3F=data(:,3);
c3V=data(:,4);
c4F=data(:,5);
c4V=data(:,6);
c5F=data(:,7);
c5V=data(:,8);

c1LR=fitlm(c1F,c1V)
c3LR=fitlm(c3F,c3V)
c4LR=fitlm(c4F,c4V)
c5LR=fitlm(c5F,c5V)

figure
hold on
plot(c1LR,"r");
plot(c3LR);
plot(c4LR);
plot(c5LR);
legend(‘Crane 1′,’Crane 1 Lin Reg’,’Crane 3′,’Crane 3 Lin Reg’,’Crane 4′,’Crane 4 Lin Reg’,’Crane 5′,’Crane 5 Lin Reg’,"Location","SouthEast")

thanksI’m trying to plot 4 different sets of data with a linear regression for each. I used the fitlm command to find hte linear regression. My problem arises with the plot all being the same color for each set of data, blue for the points and red for the regression line. I need them to be different colors for each data set for clarity sake.
data=readmatrix(‘straingage_caldata.csv’);
c1F=data(:,1);
c1V=data(:,2);
c3F=data(:,3);
c3V=data(:,4);
c4F=data(:,5);
c4V=data(:,6);
c5F=data(:,7);
c5V=data(:,8);

c1LR=fitlm(c1F,c1V)
c3LR=fitlm(c3F,c3V)
c4LR=fitlm(c4F,c4V)
c5LR=fitlm(c5F,c5V)

figure
hold on
plot(c1LR,"r");
plot(c3LR);
plot(c4LR);
plot(c5LR);
legend(‘Crane 1′,’Crane 1 Lin Reg’,’Crane 3′,’Crane 3 Lin Reg’,’Crane 4′,’Crane 4 Lin Reg’,’Crane 5′,’Crane 5 Lin Reg’,"Location","SouthEast")

thanks I’m trying to plot 4 different sets of data with a linear regression for each. I used the fitlm command to find hte linear regression. My problem arises with the plot all being the same color for each set of data, blue for the points and red for the regression line. I need them to be different colors for each data set for clarity sake.
data=readmatrix(‘straingage_caldata.csv’);
c1F=data(:,1);
c1V=data(:,2);
c3F=data(:,3);
c3V=data(:,4);
c4F=data(:,5);
c4V=data(:,6);
c5F=data(:,7);
c5V=data(:,8);

c1LR=fitlm(c1F,c1V)
c3LR=fitlm(c3F,c3V)
c4LR=fitlm(c4F,c4V)
c5LR=fitlm(c5F,c5V)

figure
hold on
plot(c1LR,"r");
plot(c3LR);
plot(c4LR);
plot(c5LR);
legend(‘Crane 1′,’Crane 1 Lin Reg’,’Crane 3′,’Crane 3 Lin Reg’,’Crane 4′,’Crane 4 Lin Reg’,’Crane 5′,’Crane 5 Lin Reg’,"Location","SouthEast")

thanks fitlm, plot MATLAB Answers — New Questions

​

Hi!
I am setting up my Raspberry Pi (model 4B) for deep learning deployment. I am following the set up steps of the Support Package for Raspberry Pi. The Pi has been flashed with the image "mathworks_raspbian_DL_R22.2.0.img".
When I tried to install the OpenCV library by executing "./installOpenCVLib", I encountered some errors, as shown in the attached screenshot. Apparently the file "opencv_raspberrypi_10.zip" could not be downloaded, although the 3 packages seems to be succesfully installed. Indeed, when I tried to connect to the link to the Mathworks site on my computer, the link was not accessible.
Can you please suggest any alternative ways to install opencv?
Thank you for your help!Hi!
I am setting up my Raspberry Pi (model 4B) for deep learning deployment. I am following the set up steps of the Support Package for Raspberry Pi. The Pi has been flashed with the image "mathworks_raspbian_DL_R22.2.0.img".
When I tried to install the OpenCV library by executing "./installOpenCVLib", I encountered some errors, as shown in the attached screenshot. Apparently the file "opencv_raspberrypi_10.zip" could not be downloaded, although the 3 packages seems to be succesfully installed. Indeed, when I tried to connect to the link to the Mathworks site on my computer, the link was not accessible.
Can you please suggest any alternative ways to install opencv?
Thank you for your help! Hi!
I am setting up my Raspberry Pi (model 4B) for deep learning deployment. I am following the set up steps of the Support Package for Raspberry Pi. The Pi has been flashed with the image "mathworks_raspbian_DL_R22.2.0.img".
When I tried to install the OpenCV library by executing "./installOpenCVLib", I encountered some errors, as shown in the attached screenshot. Apparently the file "opencv_raspberrypi_10.zip" could not be downloaded, although the 3 packages seems to be succesfully installed. Indeed, when I tried to connect to the link to the Mathworks site on my computer, the link was not accessible.
Can you please suggest any alternative ways to install opencv?
Thank you for your help! opencv, raspberry pi, deep learning MATLAB Answers — New Questions

​

I am trying to convert an array into numpy, but I keep getting this issue:
Python Error: ModuleNotFoundError: No module named ‘libmwbuffer’
Python function ” might not be able to accept input argument at position 1. The function may require a specific
data type that you can construct from the MATLAB array. For more information, see the documentation for Python
function ” and working with Python arrays.

I checked and I have this pyversion, which is supposed to be compatible with Matlab R2024a. what’s the issue?
version: ‘3.9’
executable: ‘C:Program FilesArcGISProbinPythonenvsarcgispro-py3python.EXE’
library: ‘C:Program FilesArcGISProbinPythonenvsarcgispro-py3python39.dll’
home: ‘C:Program FilesArcGISProbinPythonenvsarcgispro-py3’
isloaded: 1

I tried multiple different versions of numpy save
py.numpy.save(output_filename, data);
or
py.numpy.save(strcat(output_filename, ‘.npy’), py.numpy.array(data));
or
py.numpy.save(strcat(output_filename, ‘.npy’), data);I am trying to convert an array into numpy, but I keep getting this issue:
Python Error: ModuleNotFoundError: No module named ‘libmwbuffer’
Python function ” might not be able to accept input argument at position 1. The function may require a specific
data type that you can construct from the MATLAB array. For more information, see the documentation for Python
function ” and working with Python arrays.

I checked and I have this pyversion, which is supposed to be compatible with Matlab R2024a. what’s the issue?
version: ‘3.9’
executable: ‘C:Program FilesArcGISProbinPythonenvsarcgispro-py3python.EXE’
library: ‘C:Program FilesArcGISProbinPythonenvsarcgispro-py3python39.dll’
home: ‘C:Program FilesArcGISProbinPythonenvsarcgispro-py3’
isloaded: 1

I tried multiple different versions of numpy save
py.numpy.save(output_filename, data);
or
py.numpy.save(strcat(output_filename, ‘.npy’), py.numpy.array(data));
or
py.numpy.save(strcat(output_filename, ‘.npy’), data); I am trying to convert an array into numpy, but I keep getting this issue:
Python Error: ModuleNotFoundError: No module named ‘libmwbuffer’
Python function ” might not be able to accept input argument at position 1. The function may require a specific
data type that you can construct from the MATLAB array. For more information, see the documentation for Python
function ” and working with Python arrays.

I checked and I have this pyversion, which is supposed to be compatible with Matlab R2024a. what’s the issue?
version: ‘3.9’
executable: ‘C:Program FilesArcGISProbinPythonenvsarcgispro-py3python.EXE’
library: ‘C:Program FilesArcGISProbinPythonenvsarcgispro-py3python39.dll’
home: ‘C:Program FilesArcGISProbinPythonenvsarcgispro-py3’
isloaded: 1

I tried multiple different versions of numpy save
py.numpy.save(output_filename, data);
or
py.numpy.save(strcat(output_filename, ‘.npy’), py.numpy.array(data));
or
py.numpy.save(strcat(output_filename, ‘.npy’), data); numpy, python, libmwbuffer MATLAB Answers — New Questions

​

I am trying to modify my uiconfirm popup to select the ‘DefaultOption’ after some time to avoid having the popup open for a long period of time and holding up code execution.
I have already tried using a timer to select one of the options which didn’t seem to work but maybe I did it wrong.
I can explain what I am trying to do and why in further detail if needed.
Here is a barebones example of what I am trying to modify:
closeHdlg = uiconfirm(MainFigure, "Title",’Program’,’Options’,{‘Retry’,’Disconnect’,’Continue’},’DefaultOption’,’Retry’);
switch closeHdlg
case ‘Retry’
% Hidden for confidentiality
case ‘Disconnect’
% Hidden for confidentiality
case ‘Continue’
% Hidden for confidentiality
case ”
% close box and do nothing
end % end switchI am trying to modify my uiconfirm popup to select the ‘DefaultOption’ after some time to avoid having the popup open for a long period of time and holding up code execution.
I have already tried using a timer to select one of the options which didn’t seem to work but maybe I did it wrong.
I can explain what I am trying to do and why in further detail if needed.
Here is a barebones example of what I am trying to modify:
closeHdlg = uiconfirm(MainFigure, "Title",’Program’,’Options’,{‘Retry’,’Disconnect’,’Continue’},’DefaultOption’,’Retry’);
switch closeHdlg
case ‘Retry’
% Hidden for confidentiality
case ‘Disconnect’
% Hidden for confidentiality
case ‘Continue’
% Hidden for confidentiality
case ”
% close box and do nothing
end % end switch I am trying to modify my uiconfirm popup to select the ‘DefaultOption’ after some time to avoid having the popup open for a long period of time and holding up code execution.
I have already tried using a timer to select one of the options which didn’t seem to work but maybe I did it wrong.
I can explain what I am trying to do and why in further detail if needed.
Here is a barebones example of what I am trying to modify:
closeHdlg = uiconfirm(MainFigure, "Title",’Program’,’Options’,{‘Retry’,’Disconnect’,’Continue’},’DefaultOption’,’Retry’);
switch closeHdlg
case ‘Retry’
% Hidden for confidentiality
case ‘Disconnect’
% Hidden for confidentiality
case ‘Continue’
% Hidden for confidentiality
case ”
% close box and do nothing
end % end switch matlab gui, uiconfirm, timeout MATLAB Answers — New Questions

​

I am on Manjaro Linux and I installed Matlab R2024b.
When trying to start Matlab, I get the following error :
Cannot locate or initialize class com/mathworks/jmi/OpaqueJavaInterface.
java.lang.NoClassDefFoundError: com/mathworks/jmi/OpaqueJavaInterface
Caused by: java.lang.ClassNotFoundException: com.mathworks.jmi.OpaqueJavaInterface
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
I tried changing the java version used by using matlab_jenv to switch to the default version on my machine, 1.7. It did not make a difference. Command:
sudo ./matlab_jenv -allusers system  1 ✘
Result:  1 ✘
JavaEnvironment with properties
Version : openjdk version "17.0.13" 2024-10-15
OpenJDK Runtime Environment (build 17.0.13+11)
OpenJDK 64-Bit Server VM (build 17.0.13+11, mixed mode, sharing)
Home : /usr/lib/jvm/java-17-openjdk
Library : /usr/lib/jvm/java-17-openjdk/lib/server/libjvm.so
Configuration : system

I tried creating a java.opts file as suggested here. It did not make a difference.
I tried uninstalling and reinstalling matlab. It did not make a difference.
I had never set a MATLAB_JAVA variable, setting/unsetting it does not make a difference.
Any advice appreciated.I am on Manjaro Linux and I installed Matlab R2024b.
When trying to start Matlab, I get the following error :
Cannot locate or initialize class com/mathworks/jmi/OpaqueJavaInterface.
java.lang.NoClassDefFoundError: com/mathworks/jmi/OpaqueJavaInterface
Caused by: java.lang.ClassNotFoundException: com.mathworks.jmi.OpaqueJavaInterface
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
I tried changing the java version used by using matlab_jenv to switch to the default version on my machine, 1.7. It did not make a difference. Command:
sudo ./matlab_jenv -allusers system  1 ✘
Result:  1 ✘
JavaEnvironment with properties
Version : openjdk version "17.0.13" 2024-10-15
OpenJDK Runtime Environment (build 17.0.13+11)
OpenJDK 64-Bit Server VM (build 17.0.13+11, mixed mode, sharing)
Home : /usr/lib/jvm/java-17-openjdk
Library : /usr/lib/jvm/java-17-openjdk/lib/server/libjvm.so
Configuration : system

I tried creating a java.opts file as suggested here. It did not make a difference.
I tried uninstalling and reinstalling matlab. It did not make a difference.
I had never set a MATLAB_JAVA variable, setting/unsetting it does not make a difference.
Any advice appreciated. I am on Manjaro Linux and I installed Matlab R2024b.
When trying to start Matlab, I get the following error :
Cannot locate or initialize class com/mathworks/jmi/OpaqueJavaInterface.
java.lang.NoClassDefFoundError: com/mathworks/jmi/OpaqueJavaInterface
Caused by: java.lang.ClassNotFoundException: com.mathworks.jmi.OpaqueJavaInterface
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
I tried changing the java version used by using matlab_jenv to switch to the default version on my machine, 1.7. It did not make a difference. Command:
sudo ./matlab_jenv -allusers system  1 ✘
Result:  1 ✘
JavaEnvironment with properties
Version : openjdk version "17.0.13" 2024-10-15
OpenJDK Runtime Environment (build 17.0.13+11)
OpenJDK 64-Bit Server VM (build 17.0.13+11, mixed mode, sharing)
Home : /usr/lib/jvm/java-17-openjdk
Library : /usr/lib/jvm/java-17-openjdk/lib/server/libjvm.so
Configuration : system

I tried creating a java.opts file as suggested here. It did not make a difference.
I tried uninstalling and reinstalling matlab. It did not make a difference.
I had never set a MATLAB_JAVA variable, setting/unsetting it does not make a difference.
Any advice appreciated. installation, error, java MATLAB Answers — New Questions

​

Exactly as the title says.
Trying to read serial values from an Arduino serial port into a matlab array. The sensor we’re reading from is a heartrate sensor from https://pulsesensor.com/. This is for a science fair project where a full collection is about 30 seconds long and then it is broken into chunks of 500 datapoints. So 6 trials from one collection. 60% of the time we’ll get a sensor reading that is in a doubles format but that other 40% the code seems to read extra characters and defaults back into characters. These characters aren’t random letters either but have plenty of accents and such. (example below the code)

We dont have trouble connecting to the board and when the data is being printed into the matlab command window it shoes numberical values ranging from 0 – 750 depending on the signal voltage. Its only after the loop that the file converts into a char array (usually 3005×1).

Any suggestions on how to ensure that the file stays in double and doesnt convert into a character array? I think it might have to do with the sampling frequency and aligning the arduino with the matlab code reading it but I’m not very familar with the process. Any suggestions would be greatly appreciated.
% Define the port where Arduino is connected
arduinoPort = ‘COM3’; % Replace ‘COM3’ with your actual port
baudRate = 9600; % Set the baud rate to match the Arduino’s baud rate
s = serial(arduinoPort, ‘BaudRate’, baudRate); % Create a serial object for the Arduino

% Initialize an empty array to store PPG data
ppgData = [];
numSamples = 3000; % Set the number of samples to collect (can be adjusted)

disp(‘Collecting PPG data…’); % Display message indicating data collection has started
j=1
fopen(s); % Open the serial port for communication
while j < numSamples+1
% Check if there is data available in the serial buffer
if s.BytesAvailable > 0
i = 1:numSamples; % Loop to collect the specified number of samples
% Read data from the serial port as a string and convert to an integer
data = fscanf(s, ‘%d’);
disp(data); % Display the received data to verify if values are being read
ppgData = [ppgData, data]; % Append the new data to the PPG data array
j=j+1;
%pause(0.01); % Pause for 10 milliseconds to allow time for new data to arrive
else
disp(‘No data available in buffer.’); % Warn if no data is available
end
pause(0.01); % Pause for 10 milliseconds to allow time for new data to arrive
end

ppgData = ppgData’;

data = reshape(ppgData, [500, 6]);
‘¼’
‘Ç’
‘Ì’
‘Ê’
‘à’
‘à’
‘ç’
‘ó’
‘ñ’
‘Ā’
‘ý’
‘û’
‘Ă’
‘ó’
‘ò’
‘ì’
‘×’
‘ß’
‘Î’
‘Ç’
‘¿’
‘«’
‘«Exactly as the title says.
Trying to read serial values from an Arduino serial port into a matlab array. The sensor we’re reading from is a heartrate sensor from https://pulsesensor.com/. This is for a science fair project where a full collection is about 30 seconds long and then it is broken into chunks of 500 datapoints. So 6 trials from one collection. 60% of the time we’ll get a sensor reading that is in a doubles format but that other 40% the code seems to read extra characters and defaults back into characters. These characters aren’t random letters either but have plenty of accents and such. (example below the code)

We dont have trouble connecting to the board and when the data is being printed into the matlab command window it shoes numberical values ranging from 0 – 750 depending on the signal voltage. Its only after the loop that the file converts into a char array (usually 3005×1).

Any suggestions on how to ensure that the file stays in double and doesnt convert into a character array? I think it might have to do with the sampling frequency and aligning the arduino with the matlab code reading it but I’m not very familar with the process. Any suggestions would be greatly appreciated.
% Define the port where Arduino is connected
arduinoPort = ‘COM3’; % Replace ‘COM3’ with your actual port
baudRate = 9600; % Set the baud rate to match the Arduino’s baud rate
s = serial(arduinoPort, ‘BaudRate’, baudRate); % Create a serial object for the Arduino

% Initialize an empty array to store PPG data
ppgData = [];
numSamples = 3000; % Set the number of samples to collect (can be adjusted)

disp(‘Collecting PPG data…’); % Display message indicating data collection has started
j=1
fopen(s); % Open the serial port for communication
while j < numSamples+1
% Check if there is data available in the serial buffer
if s.BytesAvailable > 0
i = 1:numSamples; % Loop to collect the specified number of samples
% Read data from the serial port as a string and convert to an integer
data = fscanf(s, ‘%d’);
disp(data); % Display the received data to verify if values are being read
ppgData = [ppgData, data]; % Append the new data to the PPG data array
j=j+1;
%pause(0.01); % Pause for 10 milliseconds to allow time for new data to arrive
else
disp(‘No data available in buffer.’); % Warn if no data is available
end
pause(0.01); % Pause for 10 milliseconds to allow time for new data to arrive
end

ppgData = ppgData’;

data = reshape(ppgData, [500, 6]);
‘¼’
‘Ç’
‘Ì’
‘Ê’
‘à’
‘à’
‘ç’
‘ó’
‘ñ’
‘Ā’
‘ý’
‘û’
‘Ă’
‘ó’
‘ò’
‘ì’
‘×’
‘ß’
‘Î’
‘Ç’
‘¿’
‘«’
‘« Exactly as the title says.
Trying to read serial values from an Arduino serial port into a matlab array. The sensor we’re reading from is a heartrate sensor from https://pulsesensor.com/. This is for a science fair project where a full collection is about 30 seconds long and then it is broken into chunks of 500 datapoints. So 6 trials from one collection. 60% of the time we’ll get a sensor reading that is in a doubles format but that other 40% the code seems to read extra characters and defaults back into characters. These characters aren’t random letters either but have plenty of accents and such. (example below the code)

We dont have trouble connecting to the board and when the data is being printed into the matlab command window it shoes numberical values ranging from 0 – 750 depending on the signal voltage. Its only after the loop that the file converts into a char array (usually 3005×1).

Any suggestions on how to ensure that the file stays in double and doesnt convert into a character array? I think it might have to do with the sampling frequency and aligning the arduino with the matlab code reading it but I’m not very familar with the process. Any suggestions would be greatly appreciated.
% Define the port where Arduino is connected
arduinoPort = ‘COM3’; % Replace ‘COM3’ with your actual port
baudRate = 9600; % Set the baud rate to match the Arduino’s baud rate
s = serial(arduinoPort, ‘BaudRate’, baudRate); % Create a serial object for the Arduino

% Initialize an empty array to store PPG data
ppgData = [];
numSamples = 3000; % Set the number of samples to collect (can be adjusted)

disp(‘Collecting PPG data…’); % Display message indicating data collection has started
j=1
fopen(s); % Open the serial port for communication
while j < numSamples+1
% Check if there is data available in the serial buffer
if s.BytesAvailable > 0
i = 1:numSamples; % Loop to collect the specified number of samples
% Read data from the serial port as a string and convert to an integer
data = fscanf(s, ‘%d’);
disp(data); % Display the received data to verify if values are being read
ppgData = [ppgData, data]; % Append the new data to the PPG data array
j=j+1;
%pause(0.01); % Pause for 10 milliseconds to allow time for new data to arrive
else
disp(‘No data available in buffer.’); % Warn if no data is available
end
pause(0.01); % Pause for 10 milliseconds to allow time for new data to arrive
end

ppgData = ppgData’;

data = reshape(ppgData, [500, 6]);
‘¼’
‘Ç’
‘Ì’
‘Ê’
‘à’
‘à’
‘ç’
‘ó’
‘ñ’
‘Ā’
‘ý’
‘û’
‘Ă’
‘ó’
‘ò’
‘ì’
‘×’
‘ß’
‘Î’
‘Ç’
‘¿’
‘«’
‘« arduino, fscanf, char, arduino serial MATLAB Answers — New Questions

​

I have a sumation in the equation i need to integrate,

syms k;
symsum(sym(‘k’), k, 0, 10)

works fine, as does

X = 0:1:10; Y = X.^2; Z = trapz(X,Y)

however I need to somehow combine them, like

X = 0:1:10; Y = X.^2*symsum(sym(‘X’), X, 0, 10); Z = trapz(X,Y)

but this just gives the error

??? Undefined function or method ‘normalizesym’ for input arguments of type ‘double’.

Error in ==> sym.symsum at 65
if builtin(‘numel’,x) ~= 1, x = normalizesym(x); end

How can I put a equation that is summed over a range of values, into an equation that is then numerically integrated?

(p.s. For reasons out of my control I have a nasty density fn with a summation expression nested within it, which then gets put into another density function which has to be numerically integrated. The above is a just a simple example as Im struggling to get the basics right before tackeling the monster I have to integrate!I have a sumation in the equation i need to integrate,

syms k;
symsum(sym(‘k’), k, 0, 10)

works fine, as does

X = 0:1:10; Y = X.^2; Z = trapz(X,Y)

however I need to somehow combine them, like

X = 0:1:10; Y = X.^2*symsum(sym(‘X’), X, 0, 10); Z = trapz(X,Y)

but this just gives the error

??? Undefined function or method ‘normalizesym’ for input arguments of type ‘double’.

Error in ==> sym.symsum at 65
if builtin(‘numel’,x) ~= 1, x = normalizesym(x); end

How can I put a equation that is summed over a range of values, into an equation that is then numerically integrated?

(p.s. For reasons out of my control I have a nasty density fn with a summation expression nested within it, which then gets put into another density function which has to be numerically integrated. The above is a just a simple example as Im struggling to get the basics right before tackeling the monster I have to integrate! I have a sumation in the equation i need to integrate,

syms k;
symsum(sym(‘k’), k, 0, 10)

works fine, as does

X = 0:1:10; Y = X.^2; Z = trapz(X,Y)

however I need to somehow combine them, like

X = 0:1:10; Y = X.^2*symsum(sym(‘X’), X, 0, 10); Z = trapz(X,Y)

but this just gives the error

??? Undefined function or method ‘normalizesym’ for input arguments of type ‘double’.

Error in ==> sym.symsum at 65
if builtin(‘numel’,x) ~= 1, x = normalizesym(x); end

How can I put a equation that is summed over a range of values, into an equation that is then numerically integrated?

(p.s. For reasons out of my control I have a nasty density fn with a summation expression nested within it, which then gets put into another density function which has to be numerically integrated. The above is a just a simple example as Im struggling to get the basics right before tackeling the monster I have to integrate! numerical, integration, summation, combine, trapz MATLAB Answers — New Questions

​

I am using contour() to construct contour lines onto a 2D grid of data defined by the first two columns of "tog.txt," with the value defined by the third column. This data can have 10^3 or more rows. I would like to confine these lines to exist only in the region where the data exists.
I plot the scatter data as well as the border that bounds the data with boundary() for visualization.
The results of each attempt are attached. How can I ensure the contour lines are terminated by the data boundary?
togtxt = load(‘tog.txt’);

x1 = togtxt(:,1);
y1 = togtxt(:,2);
c1 = togtxt(:,3);

% —- customize figure ——————————————————-

f(1)=figure;
hold all
ax = gca;

set(gca,’LineWidth’,1.3,’TickLength’,[0.015 0.015],’plotboxaspectratio’,[1 1 1]); % size of ticks
set(gca,’ColorScale’,’log’)
xscale log

jjj = boundary(x1,y1);
plot(x1(jjj),y1(jjj));

scatter(togtxt(:,1),togtxt(:,2),2,’filled’);

N = 120;

%%% attempt 1

v1 = logspace(log10(min(c1)),log10(max(c1)),50);
I = scatteredInterpolant(x1,y1,c1);
X = linspace(min(x1),max(x1),N);
Y = linspace(min(y1),max(y1),N);
[X,Y] = meshgrid(X,Y);
Z = I(X,Y);
contour(X,Y,Z,v1);
colorbar

%%% attempt 2
% v1 = logspace(log10(min(c1)),log10(max(c1)),50);
% xv = linspace(min(x1),max(x1),N);
% yv = linspace(min(y1),max(y1),N); % will run out of memory unless N small
% [Xm,Ym] = ndgrid(xv,yv);
% MFm = griddata(x1,y1,c1,Xm,Ym);
% contour(Xm, Ym, MFm,v1)I am using contour() to construct contour lines onto a 2D grid of data defined by the first two columns of "tog.txt," with the value defined by the third column. This data can have 10^3 or more rows. I would like to confine these lines to exist only in the region where the data exists.
I plot the scatter data as well as the border that bounds the data with boundary() for visualization.
The results of each attempt are attached. How can I ensure the contour lines are terminated by the data boundary?
togtxt = load(‘tog.txt’);

x1 = togtxt(:,1);
y1 = togtxt(:,2);
c1 = togtxt(:,3);

% —- customize figure ——————————————————-

f(1)=figure;
hold all
ax = gca;

set(gca,’LineWidth’,1.3,’TickLength’,[0.015 0.015],’plotboxaspectratio’,[1 1 1]); % size of ticks
set(gca,’ColorScale’,’log’)
xscale log

jjj = boundary(x1,y1);
plot(x1(jjj),y1(jjj));

scatter(togtxt(:,1),togtxt(:,2),2,’filled’);

N = 120;

%%% attempt 1

v1 = logspace(log10(min(c1)),log10(max(c1)),50);
I = scatteredInterpolant(x1,y1,c1);
X = linspace(min(x1),max(x1),N);
Y = linspace(min(y1),max(y1),N);
[X,Y] = meshgrid(X,Y);
Z = I(X,Y);
contour(X,Y,Z,v1);
colorbar

%%% attempt 2
% v1 = logspace(log10(min(c1)),log10(max(c1)),50);
% xv = linspace(min(x1),max(x1),N);
% yv = linspace(min(y1),max(y1),N); % will run out of memory unless N small
% [Xm,Ym] = ndgrid(xv,yv);
% MFm = griddata(x1,y1,c1,Xm,Ym);
% contour(Xm, Ym, MFm,v1) I am using contour() to construct contour lines onto a 2D grid of data defined by the first two columns of "tog.txt," with the value defined by the third column. This data can have 10^3 or more rows. I would like to confine these lines to exist only in the region where the data exists.
I plot the scatter data as well as the border that bounds the data with boundary() for visualization.
The results of each attempt are attached. How can I ensure the contour lines are terminated by the data boundary?
togtxt = load(‘tog.txt’);

x1 = togtxt(:,1);
y1 = togtxt(:,2);
c1 = togtxt(:,3);

% —- customize figure ——————————————————-

f(1)=figure;
hold all
ax = gca;

set(gca,’LineWidth’,1.3,’TickLength’,[0.015 0.015],’plotboxaspectratio’,[1 1 1]); % size of ticks
set(gca,’ColorScale’,’log’)
xscale log

jjj = boundary(x1,y1);
plot(x1(jjj),y1(jjj));

scatter(togtxt(:,1),togtxt(:,2),2,’filled’);

N = 120;

%%% attempt 1

v1 = logspace(log10(min(c1)),log10(max(c1)),50);
I = scatteredInterpolant(x1,y1,c1);
X = linspace(min(x1),max(x1),N);
Y = linspace(min(y1),max(y1),N);
[X,Y] = meshgrid(X,Y);
Z = I(X,Y);
contour(X,Y,Z,v1);
colorbar

%%% attempt 2
% v1 = logspace(log10(min(c1)),log10(max(c1)),50);
% xv = linspace(min(x1),max(x1),N);
% yv = linspace(min(y1),max(y1),N); % will run out of memory unless N small
% [Xm,Ym] = ndgrid(xv,yv);
% MFm = griddata(x1,y1,c1,Xm,Ym);
% contour(Xm, Ym, MFm,v1) meshgrid, contour MATLAB Answers — New Questions

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I want to use a hardware interrupt, in particular, the TXE flag on Simulink, however I have found that there does not appear to be a hardware interrupt block in the simulink support package for stm32 nucleo boards.

The hardware interrupt blocks for STM32F4 Discovery and the ARM Cortex-Mx don’t give any errors but I cannot imagine that using them would be correct.

Is there a way to get the TXE flag for the STM32 Nucleo F767ZI on simulink or should I just restart my project on the STM32CubeIDE instead.I want to use a hardware interrupt, in particular, the TXE flag on Simulink, however I have found that there does not appear to be a hardware interrupt block in the simulink support package for stm32 nucleo boards.

The hardware interrupt blocks for STM32F4 Discovery and the ARM Cortex-Mx don’t give any errors but I cannot imagine that using them would be correct.

Is there a way to get the TXE flag for the STM32 Nucleo F767ZI on simulink or should I just restart my project on the STM32CubeIDE instead. I want to use a hardware interrupt, in particular, the TXE flag on Simulink, however I have found that there does not appear to be a hardware interrupt block in the simulink support package for stm32 nucleo boards.

The hardware interrupt blocks for STM32F4 Discovery and the ARM Cortex-Mx don’t give any errors but I cannot imagine that using them would be correct.

Is there a way to get the TXE flag for the STM32 Nucleo F767ZI on simulink or should I just restart my project on the STM32CubeIDE instead. simulink, embedded coder MATLAB Answers — New Questions

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Hi there! What is the best way to plot a 3D surface whose matrix C = A/B contains values of +/- infinity (whenever entries in B are zero)? Currently I am using surf( ), which results in weird vertical cross sections. I looked into the fillMissing( ) and scatteredInterpolant( ) functions. Is there a best / recommended way to proceed, to plot a smooth surface? Thanks in advance,Hi there! What is the best way to plot a 3D surface whose matrix C = A/B contains values of +/- infinity (whenever entries in B are zero)? Currently I am using surf( ), which results in weird vertical cross sections. I looked into the fillMissing( ) and scatteredInterpolant( ) functions. Is there a best / recommended way to proceed, to plot a smooth surface? Thanks in advance, Hi there! What is the best way to plot a 3D surface whose matrix C = A/B contains values of +/- infinity (whenever entries in B are zero)? Currently I am using surf( ), which results in weird vertical cross sections. I looked into the fillMissing( ) and scatteredInterpolant( ) functions. Is there a best / recommended way to proceed, to plot a smooth surface? Thanks in advance, matlab surface plot singularities MATLAB Answers — New Questions

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