I have run into some trouble using the "readmatrix" function and was wondering if anyone has any insights. I am trying to plot a comparison between a 2D airfoil’s Cp distribution as a function of %chord and my aircraft’s 3D Cp as a %chord (at a given span position) from XFLR5’s .txt files.
When my 3D aircraft does not have wing flaps, the readmatrix function works perfectly; however, when I use the file with flaps I get a column of NaNs as my matrix output. The two files are almost identical spare a few lines close to the start, leading me to be very confused why the second txt file cannot be properly interpreted with the readmatrix() function. Additionally, I don’t need any of the data before the y-span row. I have tried other methods such as "readcell" and "readtable" but those either don’t work or intrepret the data imporperly. Does anyone have any suggestions?
Thanks!

Here is how I call each of these (pardon my variable naming convention)
"Aoa3MainWing…" is the file which is working correctly and "MainWing…" is the one with errors

Below Screenshots the working file (Aoa3MainWing…)

Above: txt file for no flaps

Above: datafile after readmatrix()

Below Screenshots of the non-working file (MainWing…)

Above: txt file for flaps (only difference ,aside from data values, is "Main WingFlap…" and "Flap 2 Moment…" lines being added)

Above: datafile after readmatrix() producing only a column of NaNsI have run into some trouble using the "readmatrix" function and was wondering if anyone has any insights. I am trying to plot a comparison between a 2D airfoil’s Cp distribution as a function of %chord and my aircraft’s 3D Cp as a %chord (at a given span position) from XFLR5’s .txt files.
When my 3D aircraft does not have wing flaps, the readmatrix function works perfectly; however, when I use the file with flaps I get a column of NaNs as my matrix output. The two files are almost identical spare a few lines close to the start, leading me to be very confused why the second txt file cannot be properly interpreted with the readmatrix() function. Additionally, I don’t need any of the data before the y-span row. I have tried other methods such as "readcell" and "readtable" but those either don’t work or intrepret the data imporperly. Does anyone have any suggestions?
Thanks!

Here is how I call each of these (pardon my variable naming convention)
"Aoa3MainWing…" is the file which is working correctly and "MainWing…" is the one with errors

Below Screenshots the working file (Aoa3MainWing…)

Above: txt file for no flaps

Above: datafile after readmatrix()

Below Screenshots of the non-working file (MainWing…)

Above: txt file for flaps (only difference ,aside from data values, is "Main WingFlap…" and "Flap 2 Moment…" lines being added)

Above: datafile after readmatrix() producing only a column of NaNs I have run into some trouble using the "readmatrix" function and was wondering if anyone has any insights. I am trying to plot a comparison between a 2D airfoil’s Cp distribution as a function of %chord and my aircraft’s 3D Cp as a %chord (at a given span position) from XFLR5’s .txt files.
When my 3D aircraft does not have wing flaps, the readmatrix function works perfectly; however, when I use the file with flaps I get a column of NaNs as my matrix output. The two files are almost identical spare a few lines close to the start, leading me to be very confused why the second txt file cannot be properly interpreted with the readmatrix() function. Additionally, I don’t need any of the data before the y-span row. I have tried other methods such as "readcell" and "readtable" but those either don’t work or intrepret the data imporperly. Does anyone have any suggestions?
Thanks!

Here is how I call each of these (pardon my variable naming convention)
"Aoa3MainWing…" is the file which is working correctly and "MainWing…" is the one with errors

Below Screenshots the working file (Aoa3MainWing…)

Above: txt file for no flaps

Above: datafile after readmatrix()

Below Screenshots of the non-working file (MainWing…)

Above: txt file for flaps (only difference ,aside from data values, is "Main WingFlap…" and "Flap 2 Moment…" lines being added)

Above: datafile after readmatrix() producing only a column of NaNs readmatrix, data import MATLAB Answers — New Questions

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in an old m file I used the function ltipack.checkABCDE for lti model.
This function is not recognized by 2024 Matlab version.
I would like to know what replaced this function.in an old m file I used the function ltipack.checkABCDE for lti model.
This function is not recognized by 2024 Matlab version.
I would like to know what replaced this function. in an old m file I used the function ltipack.checkABCDE for lti model.
This function is not recognized by 2024 Matlab version.
I would like to know what replaced this function. lti, simulink MATLAB Answers — New Questions

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I get the error when trying to define a range slider. I copied and pasted the Mathworks example code and get this error. Does anyone no why?
Error using uislider
No value was given for ‘range’. Name-value pair arguments require a name followed by a value.
Error in sliderApp (line 3)
sld = uislider(fig,"range");I get the error when trying to define a range slider. I copied and pasted the Mathworks example code and get this error. Does anyone no why?
Error using uislider
No value was given for ‘range’. Name-value pair arguments require a name followed by a value.
Error in sliderApp (line 3)
sld = uislider(fig,"range"); I get the error when trying to define a range slider. I copied and pasted the Mathworks example code and get this error. Does anyone no why?
Error using uislider
No value was given for ‘range’. Name-value pair arguments require a name followed by a value.
Error in sliderApp (line 3)
sld = uislider(fig,"range"); uislider, slider, rangeslider, appdesigner, app designer, gui MATLAB Answers — New Questions

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I want to show user a figure, and ask them to click somewhere within a stipulated time limit, like 2 seconds.
I am using ginput as follows, but it seems to be pausing the execution before a button is pressed. I went to check in the ginput function and indeed it was using waitforbuttonpress. I tried some hands in getting a workaround but wasn’t much succesfull to interrup ginput (specifically it’s wfbp function).

I am attaching a sample code what i need.

I am okay in getting to know some work-arounds, even if they don’t use ginput, but i’d still love to know what exactly could ba a solution if I were to use ginput.

Thanks in advanced

x = linspace(0,4*pi,2000);
y=sin(x);
plot(x,y);

timeout=2;
tic;
[xt,yt]=ginput(1);
if toc>2
xt=NaN;
yt=NaN;
endI want to show user a figure, and ask them to click somewhere within a stipulated time limit, like 2 seconds.
I am using ginput as follows, but it seems to be pausing the execution before a button is pressed. I went to check in the ginput function and indeed it was using waitforbuttonpress. I tried some hands in getting a workaround but wasn’t much succesfull to interrup ginput (specifically it’s wfbp function).

I am attaching a sample code what i need.

I am okay in getting to know some work-arounds, even if they don’t use ginput, but i’d still love to know what exactly could ba a solution if I were to use ginput.

Thanks in advanced

x = linspace(0,4*pi,2000);
y=sin(x);
plot(x,y);

timeout=2;
tic;
[xt,yt]=ginput(1);
if toc>2
xt=NaN;
yt=NaN;
end I want to show user a figure, and ask them to click somewhere within a stipulated time limit, like 2 seconds.
I am using ginput as follows, but it seems to be pausing the execution before a button is pressed. I went to check in the ginput function and indeed it was using waitforbuttonpress. I tried some hands in getting a workaround but wasn’t much succesfull to interrup ginput (specifically it’s wfbp function).

I am attaching a sample code what i need.

I am okay in getting to know some work-arounds, even if they don’t use ginput, but i’d still love to know what exactly could ba a solution if I were to use ginput.

Thanks in advanced

x = linspace(0,4*pi,2000);
y=sin(x);
plot(x,y);

timeout=2;
tic;
[xt,yt]=ginput(1);
if toc>2
xt=NaN;
yt=NaN;
end ginput, matlab, matlab gui, figure, plot, plotting, function, functions, matlab function, if statement, input, urgent MATLAB Answers — New Questions

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The two farthest ytickslabels (in this case both -1 and +1), do not show up if I use ax.YAxisLocation = ‘origin’
x=-1:0.1:1;
plot(x,x,’o-‘)
ax=gca;
ax.YAxisLocation = ‘origin’;
set(ax,’fontsize’,20)
yticks([-1 -0.5 0 0.5 1])

Is there a way to show them without playing with ylim([-2 2]) as here below?
x=-1:0.1:1;
plot(x,x,’o-‘)
ax=gca;
ax.YAxisLocation = ‘origin’;
set(ax,’fontsize’,20)
yticks([-1 -0.5 0 0.5 1])
ylim([-2 2])The two farthest ytickslabels (in this case both -1 and +1), do not show up if I use ax.YAxisLocation = ‘origin’
x=-1:0.1:1;
plot(x,x,’o-‘)
ax=gca;
ax.YAxisLocation = ‘origin’;
set(ax,’fontsize’,20)
yticks([-1 -0.5 0 0.5 1])

Is there a way to show them without playing with ylim([-2 2]) as here below?
x=-1:0.1:1;
plot(x,x,’o-‘)
ax=gca;
ax.YAxisLocation = ‘origin’;
set(ax,’fontsize’,20)
yticks([-1 -0.5 0 0.5 1])
ylim([-2 2]) The two farthest ytickslabels (in this case both -1 and +1), do not show up if I use ax.YAxisLocation = ‘origin’
x=-1:0.1:1;
plot(x,x,’o-‘)
ax=gca;
ax.YAxisLocation = ‘origin’;
set(ax,’fontsize’,20)
yticks([-1 -0.5 0 0.5 1])

Is there a way to show them without playing with ylim([-2 2]) as here below?
x=-1:0.1:1;
plot(x,x,’o-‘)
ax=gca;
ax.YAxisLocation = ‘origin’;
set(ax,’fontsize’,20)
yticks([-1 -0.5 0 0.5 1])
ylim([-2 2]) yaxislocation, origin, yticks, yticklabels MATLAB Answers — New Questions

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I am implementing a Simulink model in which I would like to use time-varying parameters for certain blocks. I have tried using a timeseries object to specify parameter values as a function of time, but this is not one of the supported parameter formats. Are there any ways in which this can be accomplished?I am implementing a Simulink model in which I would like to use time-varying parameters for certain blocks. I have tried using a timeseries object to specify parameter values as a function of time, but this is not one of the supported parameter formats. Are there any ways in which this can be accomplished? I am implementing a Simulink model in which I would like to use time-varying parameters for certain blocks. I have tried using a timeseries object to specify parameter values as a function of time, but this is not one of the supported parameter formats. Are there any ways in which this can be accomplished? time-varying MATLAB Answers — New Questions

​

I am almost completing the MATLAB Onramp and am considering completing the Fundamentals self-paced course after. I was wondering if there would possibly be certificates of completion for each course after I complete them? I would like to include this in my resume. Thank you in advance!I am almost completing the MATLAB Onramp and am considering completing the Fundamentals self-paced course after. I was wondering if there would possibly be certificates of completion for each course after I complete them? I would like to include this in my resume. Thank you in advance! I am almost completing the MATLAB Onramp and am considering completing the Fundamentals self-paced course after. I was wondering if there would possibly be certificates of completion for each course after I complete them? I would like to include this in my resume. Thank you in advance! certificate, self-paced, onramp, fundamentals MATLAB Answers — New Questions

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Hello! I am having trouble with pulling specific data. I am trying to read a .csv file and grab specific columns by name, not by the column number/position. The data I a looking to grab doesnt’t always end up in the same column.
CurrentData = readtable(‘data.csv’,’ReadVariableNames’,1);
TimeData = CurrentData(:, 1); % Column A data ( time in seconds )
I have time data as a specific column since it is always in the first column. Here is some code I’ve tried from other threads but I now have an issue with the size –
[data, text] = readtable(‘5DV20WLRCJ010__671_edited.csv’);
Throttle = strcmpi(text(1,:),’d ThrottleAct’);
A = data(:,Throttle);
‘d ThrottleAct’ is the column I am trying to pull, but the data too large when I try this method – that and I don’t fully understand it, haha. The data I am using is a 2567×468 table, and sometimes there are more or less variables.

Here is the error I get:
Error using readtable
Too many output arguments.

Error in project_testing (line 22)
[data, text] = readtable(‘data.csv’);
I think it is having trouble with the read table, but I’m not sure of a better way to read the data and column headers as well as keeping it in this format.

Thanks for the help in advanceHello! I am having trouble with pulling specific data. I am trying to read a .csv file and grab specific columns by name, not by the column number/position. The data I a looking to grab doesnt’t always end up in the same column.
CurrentData = readtable(‘data.csv’,’ReadVariableNames’,1);
TimeData = CurrentData(:, 1); % Column A data ( time in seconds )
I have time data as a specific column since it is always in the first column. Here is some code I’ve tried from other threads but I now have an issue with the size –
[data, text] = readtable(‘5DV20WLRCJ010__671_edited.csv’);
Throttle = strcmpi(text(1,:),’d ThrottleAct’);
A = data(:,Throttle);
‘d ThrottleAct’ is the column I am trying to pull, but the data too large when I try this method – that and I don’t fully understand it, haha. The data I am using is a 2567×468 table, and sometimes there are more or less variables.

Here is the error I get:
Error using readtable
Too many output arguments.

Error in project_testing (line 22)
[data, text] = readtable(‘data.csv’);
I think it is having trouble with the read table, but I’m not sure of a better way to read the data and column headers as well as keeping it in this format.

Thanks for the help in advance Hello! I am having trouble with pulling specific data. I am trying to read a .csv file and grab specific columns by name, not by the column number/position. The data I a looking to grab doesnt’t always end up in the same column.
CurrentData = readtable(‘data.csv’,’ReadVariableNames’,1);
TimeData = CurrentData(:, 1); % Column A data ( time in seconds )
I have time data as a specific column since it is always in the first column. Here is some code I’ve tried from other threads but I now have an issue with the size –
[data, text] = readtable(‘5DV20WLRCJ010__671_edited.csv’);
Throttle = strcmpi(text(1,:),’d ThrottleAct’);
A = data(:,Throttle);
‘d ThrottleAct’ is the column I am trying to pull, but the data too large when I try this method – that and I don’t fully understand it, haha. The data I am using is a 2567×468 table, and sometimes there are more or less variables.

Here is the error I get:
Error using readtable
Too many output arguments.

Error in project_testing (line 22)
[data, text] = readtable(‘data.csv’);
I think it is having trouble with the read table, but I’m not sure of a better way to read the data and column headers as well as keeping it in this format.

Thanks for the help in advance matlab, matlab code, importing excel data, excel, column headers, recalling, spreadsheet, data import, data MATLAB Answers — New Questions

​

Hello,
I am trying to import different .txt files and when the value in column 1 =0 merge that row with the row above So the values in the cells are merged into the singular cell above. These text files will have a consitant format as seen below but the individual values will be different. So needing it to work for all .txt imported.
Example of the matrix:
Col 1 Col 2
X777784 R22,R34,R536,
D253,D273
X654646 D43,D263

Desired Output:
Col 1 Col 2
X777784 R22,R34,R536,D253,D273
X654646 D43,D263Hello,
I am trying to import different .txt files and when the value in column 1 =0 merge that row with the row above So the values in the cells are merged into the singular cell above. These text files will have a consitant format as seen below but the individual values will be different. So needing it to work for all .txt imported.
Example of the matrix:
Col 1 Col 2
X777784 R22,R34,R536,
D253,D273
X654646 D43,D263

Desired Output:
Col 1 Col 2
X777784 R22,R34,R536,D253,D273
X654646 D43,D263 Hello,
I am trying to import different .txt files and when the value in column 1 =0 merge that row with the row above So the values in the cells are merged into the singular cell above. These text files will have a consitant format as seen below but the individual values will be different. So needing it to work for all .txt imported.
Example of the matrix:
Col 1 Col 2
X777784 R22,R34,R536,
D253,D273
X654646 D43,D263

Desired Output:
Col 1 Col 2
X777784 R22,R34,R536,D253,D273
X654646 D43,D263 string matrix manipulation, merge rows MATLAB Answers — New Questions

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Hi, Im trying to save plot data by using a structured arra

ax=app.UIAxes;
ax.Children;
h1 = findall(ax, ‘type’, ‘line’); % Line objects
nlines=numel(h1);
Assign the desired plot parameters to a struct "S"
for i=1:nlines
thisLine=h1(i);
S(i).Xdata=thisLine.XData; S(i).Ydata=thisLine.YData;
S(i).Colour=thisLine.Color;
S(i).LineStyle=thisLine.LineStyle;
S(i).LineWidth=thisLine.LineWidth;
S(i).DName=thisLine.DisplayName;
end

Save to a .MAT file
try
[file,folder]=uiputfile({‘*.mat’,’Matlab Files’},’Save Data’,app.startfolder);
catch
[file,folder]=uiputfile({‘*.mat’,’Matlab Files’},’Save Data’,’C:’);
end
app.startfolder=folder;
savepath=fullfile(folder,file);

save(savepath,"-struct",’S’)
But I keep getting this error:
Error using save
The argument to -STRUCT must be the name of a scalar structure variable.
I have checked the class of S and the fieldnames contained within it:
fields = fieldnames(S)
class(S)

fields =
6×1 cell array
{‘Xdata’ }
{‘Ydata’ }
{‘Colour’ }
{‘LineStyle’}
{‘LineWidth’}
{‘DName’ }

ans =
‘struct’

Thanks for any helpHi, Im trying to save plot data by using a structured arra

ax=app.UIAxes;
ax.Children;
h1 = findall(ax, ‘type’, ‘line’); % Line objects
nlines=numel(h1);
Assign the desired plot parameters to a struct "S"
for i=1:nlines
thisLine=h1(i);
S(i).Xdata=thisLine.XData; S(i).Ydata=thisLine.YData;
S(i).Colour=thisLine.Color;
S(i).LineStyle=thisLine.LineStyle;
S(i).LineWidth=thisLine.LineWidth;
S(i).DName=thisLine.DisplayName;
end

Save to a .MAT file
try
[file,folder]=uiputfile({‘*.mat’,’Matlab Files’},’Save Data’,app.startfolder);
catch
[file,folder]=uiputfile({‘*.mat’,’Matlab Files’},’Save Data’,’C:’);
end
app.startfolder=folder;
savepath=fullfile(folder,file);

save(savepath,"-struct",’S’)
But I keep getting this error:
Error using save
The argument to -STRUCT must be the name of a scalar structure variable.
I have checked the class of S and the fieldnames contained within it:
fields = fieldnames(S)
class(S)

fields =
6×1 cell array
{‘Xdata’ }
{‘Ydata’ }
{‘Colour’ }
{‘LineStyle’}
{‘LineWidth’}
{‘DName’ }

ans =
‘struct’

Thanks for any help Hi, Im trying to save plot data by using a structured arra

ax=app.UIAxes;
ax.Children;
h1 = findall(ax, ‘type’, ‘line’); % Line objects
nlines=numel(h1);
Assign the desired plot parameters to a struct "S"
for i=1:nlines
thisLine=h1(i);
S(i).Xdata=thisLine.XData; S(i).Ydata=thisLine.YData;
S(i).Colour=thisLine.Color;
S(i).LineStyle=thisLine.LineStyle;
S(i).LineWidth=thisLine.LineWidth;
S(i).DName=thisLine.DisplayName;
end

Save to a .MAT file
try
[file,folder]=uiputfile({‘*.mat’,’Matlab Files’},’Save Data’,app.startfolder);
catch
[file,folder]=uiputfile({‘*.mat’,’Matlab Files’},’Save Data’,’C:’);
end
app.startfolder=folder;
savepath=fullfile(folder,file);

save(savepath,"-struct",’S’)
But I keep getting this error:
Error using save
The argument to -STRUCT must be the name of a scalar structure variable.
I have checked the class of S and the fieldnames contained within it:
fields = fieldnames(S)
class(S)

fields =
6×1 cell array
{‘Xdata’ }
{‘Ydata’ }
{‘Colour’ }
{‘LineStyle’}
{‘LineWidth’}
{‘DName’ }

ans =
‘struct’

Thanks for any help struct, mat, save MATLAB Answers — New Questions

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