Walter Roberson

Last seen: Today | Actif depuis 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
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Error trying to start Simulink from m-file.
It sounds as if the block diagram 'Gelenkmodell' is configured with an InitFcn that invokes Reibkennlinie_festlegen but that Re...

26 minutes il y a | 0

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Please assist to resolve "magaa and mag2a" codes problems; probably FUN and fsolve, not properly sets. The mag2 has to generate 12 (Qy-variable) questions by for-end. Thanks
function [Qy, FUN] = MAGa(Qy0) tic, n=12; pipes=n; dia=n; LP=4; cCc=7; HLD=-0; ee=0.04; vs=1.00001*10^-6; ...

31 minutes il y a | 0

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I keep getting a “cannot convert double value “…” to a handle. Does anybody know how I can fix my code in order for this to go away
Historically, up to R2014a, it was the case that graphics handles were returned as double precision numbers. This allowed constr...

environ une heure il y a | 0

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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...

environ 15 heures il y a | 0

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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 ...

environ 16 heures il y a | 0

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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...

environ 16 heures il y a | 0

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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 ...

environ 16 heures il y a | 0

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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

1 jour il y a | 0

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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...

1 jour il y a | 0

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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 ...

1 jour il y a | 0

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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...

2 jours il y a | 0

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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 jours il y a | 1

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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 jours il y a | 0

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

3 jours il y a | 0

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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 ...

3 jours il y a | 0

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

3 jours il y a | 0

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

3 jours il y a | 0

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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 jours il y a | 0

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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 jours il y a | 0

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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 jours il y a | 0

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A répondu
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...

4 jours il y a | 0

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

4 jours il y a | 0

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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...

4 jours il y a | 0

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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 jours il y a | 0

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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 jours il y a | 0

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A répondu
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 jours il y a | 0

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

4 jours il y a | 0

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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 jours il y a | 0

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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 jours il y a | 0

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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 jours il y a | 0

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Walter Roberson

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