Walter Roberson

Last seen: Today | Active since 2011

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I do not do free private consulting. If you want to bring my attention to something, send a link to the MATLAB Answers location. I am currently caught up to T0099119; if you are waiting on a reply from me for an older issue, please send me a reminder.

Programming Languages:
C, MATLAB, Shell, Perl, Fortran
Spoken Languages:
English

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Answered
How to use integral when limits are anonymous functions
Your problem is unsolvable (in the form stated) You cannot use integral() with symbolic limits: integral() is strictly a numeri...

2 hours ago | 0

Answered
Are Windows machine for desktop real time and speedgoat using simulink real time uses same kind of processors aechitecture?
Speedgoat runs on Intel x64 class of processors, it appears to me. For different systems, I see reference to Atom processors or ...

2 hours ago | 0

Answered
How to save a figure as a geotiff
geotiffwrite from the Mapping Toolbox But I don't know what it means to save an "entire" surface, as distinct from the points t...

2 hours ago | 0

Answered
Why are some of my functions 'Undefined' in my standalone executable compiled from MATLAB source and pcode files?
In https://www.mathworks.com/matlabcentral/answers/1579108-how-do-i-use-and-s-flag-for-compiling-a-matlab-app#comment_2779289 ...

3 hours ago | 0

Answered
Loading hex values from a file vs executing .m file that contains same values
It's a bug. It is processing all d and D as if they were e

23 hours ago | 0

Answered
How do I set a read-only class to a specific value
No, there is not. And if there was a way, setting the NumBytesAvailable would confuse the system because it would either lose tr...

23 hours ago | 0

Answered
Why I am not able to open openExample('simscapefluids/ElectricVehicleThermalManagementExample') ?
If you are using an older version of MATLAB, you might need to use sscfluids_ev_thermal_management The example was renamed in ...

23 hours ago | 0

Answered
HDL Coder Error: HDL code generation does not support variable-size matrix type.
temp_slice(1:16-b+1) = temp(b:16,b); % You do not declare temp_slice before use, so you are growing it within a loop, which...

1 day ago | 0

Answered
running matlab exe file results in "Too many input arguments. MATLAB:TooManyInputs error"
You need function main_file(varargin) When you compile an executable, command line arguments are passed as parameters to the m...

2 days ago | 1

Answered
Excel headers with symbols
You have to either code the symbols as character constants or else code the unicode to create the symbols. C = [Tag + "_" + L...

2 days ago | 0

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Answered
How do I use my data set in an equation?
lb = mean(lm,1); formula = log(lb./lm);

2 days ago | 0

Answered
Received this error, not sure how to fix
M=1:2:11; N=1:2:11; those are length 6 for i=1:length(M) for j=1:length(N) for mi=1:i for ni=1+j ...

2 days ago | 0

Answered
Create contour plot from scatter plot
See https://www.mathworks.com/matlabcentral/fileexchange/38858-contour-plot-for-scattered-data

2 days ago | 0

Answered
Can function [s,h] = silhouette(X, clust, distance, varargin) be run using parfor (parallel computation)?
Sorry, you cannot accelerate it using parallel computation.

2 days ago | 0

Answered
error in concatenating cells
ft_epoch = cell2mat(reshape(ftData728178E.trial, 1, 1, [])); However, if what you are already doing creates NaN then it means...

3 days ago | 0

Answered
What does it mean "/Multiple" after variable name in *.mat file?
The .mat file has been created by an external program not using the official Application Programming Interface. The variable nam...

3 days ago | 0

Answered
Support for NVIDIA RTX A1000
The RTX A1000 has compute capacity 8.6 according to several sites I check. As such, the Parallel Computing Toolbox should be ab...

3 days ago | 0

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Answered
Error in AWGN Using Integers or scalar doubles
lenna = imread('lenna.png'); the result is almost certainly a uint8 matrix. lenna_gray = rgb2gray(lenna); rgb2gray() of a uin...

3 days ago | 0

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Answered
how to convert text file as it was written .m file to call functions?
SS = fileread(NAME_OF_FILE); eval(SS)

3 days ago | 0

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Answered
Error using lassoglm>glmProcessData
If you are passing in Weights, at least one weight must be positive. Otherwise: you need at least one row of X to contain finit...

3 days ago | 0

Answered
not enough input arguments
You are trying to run the function by pressing the green Run button. When you run the function by pressing the green Run button,...

4 days ago | 0

Answered
How to run all the image with format jpg in folder? and save into folder?
dinfo = dir('*.jpg'); filenames = fullfile({dinfo.folder}, {dinfo.name}); nfiles = length(filenames); magnificationFactor = 1...

4 days ago | 0

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Answered
Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.
The output of predict(Model2,TeDat_r) will be a vector with the same number of rows as TeDat_r has. But TeDat_r is undefined her...

4 days ago | 0

Answered
volume calculation from the DelaunayTri(x,y,z) function
DT = DelaunayTri(x,y,z); [~, Volume] = convexhull(DT);

4 days ago | 0

Answered
Data fiting in Matlab
You have a missing ) in Ypluss . I had to guess about where it goes. y_data = %... U_data = %... B_data = %... mu_data = %.....

5 days ago | 0

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Answered
How to get map information from jp2 images ?
You need to run an external program that reads EXIF information from the file... and hope that the information is recorded in th...

5 days ago | 0

Answered
How to use Matlab to get georeferencing information of a JP2 image?
You need to run an external program that reads EXIF information from the file... and hope that the information is recorded in th...

5 days ago | 0

Answered
Stop an app designer callback thread like the debugger does?
"It is evident that whenever the user clicks a button in an app designer app, the callback is called in a new thread." No, the ...

5 days ago | 0

Answered
Warning: Variable appears to change size on every loop iteration (within a script). Consider preallocating for speed.
power = zeros(k, 3); cst = zeros(k, 4); before the while loop.

5 days ago | 0

Answered
can image tiff convert to grayscale
zipname = 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/1674421/sample.zip'; tfile = fullfile(tempdir(), 'sam...

5 days ago | 0

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