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Walter Roberson


Last seen: Today Active since 2011

Followers: 5   Following: 0

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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
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 hours 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 hours ago | 0

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...

10 hours ago | 0

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

11 hours ago | 0

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...

11 hours 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,...

22 hours 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...

22 hours 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...

1 day ago | 0

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

1 day 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 = %.....

2 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...

2 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...

2 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 ...

2 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.

2 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...

2 days ago | 0

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Answered
automatic change in variable's value during optimisation
You do not do that. It is a truism that during any one call to the optimization routine, that given any particular set of trial ...

2 days ago | 0

| accepted

Answered
How would I properly go about creating this function?
l = 70*12; %length maxHeight = 12; %maximum height of beam maxWidth = 10; %maximum width of beam minHeight ...

2 days ago | 1

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Answered
wait for several system calls to finish
You have to use taskmgr (Windows) or ps (MacOS or Linux) to detect whether the processes are still alive. Note: If you are usin...

2 days ago | 0

Answered
How to use enviwrite in matlab?
A compatible envirwrite is at https://github.com/akayasse/ENVI-read-and-write-for-MATLAB

2 days ago | 0

Answered
uigetfile Multiselect option not working for single file select
[files, pathname] = uigetfile({'*.xls*'; '*.csv'}, ... 'Select One or More Files', 'MultiSelect', 'on'); if isnumeric(fi...

3 days ago | 1

Answered
How to detect (programmatically induced) value changes of uidropdown?
I am aware of the ValueChangedFcn callback. However this callback is only executed when the change is made by the user via the U...

3 days ago | 0

| accepted

Answered
command not found: pip
pip is a python command, not a shell command. !python pip install tensorflow

3 days ago | 0

Answered
what type of error is this? is this the logical error, simulation error, code error?
TargetDeltaV is not defined. Meanwhile, you assign to DeltaV but do not use DeltaV in the code.

3 days ago | 0

Answered
when i try to integrate the function it keeps giving me an error
ao=(int(sym(3),0,0.01)+int(sym(-3),0.01,0.02))

4 days ago | 0

Answered
Unable to perform assignment
t=5; syms u10 u9 u8 u7 u6 u5 u4 u3 u2 u1; syms x10 x9 x8 x7 x6 x5 x4 x3 x2 x1; syms y10 y9 y8 y7 y6 y5 y4 y3 y2 y1; a12 =...

4 days ago | 0

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Answered
TerminalConfig error for Matlab 2015a
The session interface begins with daq.createSession and sessions do not have a TerminalConfig property https://www.mathworks.co...

5 days ago | 0

Answered
Add lines of text to CNC programming code
filename_in = '10267.TAP'; [filedir, basename, ext] = fileparts(filename_in); filename_out = fullfile(filedir, basename + "_...

5 days ago | 0

Answered
Digital Image Corrupted by AWGN
lenna = imread('lenna.pgm'); lenna_bin = reshape(dec2bin(lenna(:), 8).' - '0', 1, [])'; lenna_bin reflects the size of lenna i...

5 days ago | 0

| accepted

Answered
Why do i get this error? "Unrecognized function or variable 'prop'."
You are trying to invoke Export_SolidWorks_v18 passing in the single undefined parameter prop . prop is undefined. There is no ...

5 days ago | 0

| accepted

Answered
How can I reduce the execution time of my code?
for i = 1:m-1 for j = 0:(i - 1) for k = 1:(2^j + 1)-1 if i == 2^j + k - 1 fprintf('F...

5 days ago | 0

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