Walter Roberson

Last seen: Today | Con actividad desde 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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Respondida
How do I use my data set in an equation?
lb = mean(lm,1); formula = log(lb./lm);

18 minutos hace | 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 ...

20 minutos hace | 0

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

alrededor de 2 horas hace | 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.

alrededor de 3 horas hace | 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...

alrededor de 20 horas hace | 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...

alrededor de 23 horas hace | 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...

alrededor de 23 horas hace | 0

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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...

1 día hace | 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)

1 día hace | 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...

1 día hace | 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,...

1 día hace | 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...

1 día hace | 0

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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...

2 días hace | 0

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

2 días hace | 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 = %.....

3 días hace | 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...

3 días hace | 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...

3 días hace | 0

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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 ...

3 días hace | 0

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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.

3 días hace | 0

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

3 días hace | 0

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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 ...

3 días hace | 0

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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 ...

3 días hace | 1

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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...

3 días hace | 0

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

3 días hace | 0

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

4 días hace | 1

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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...

4 días hace | 0

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

4 días hace | 0

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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.

4 días hace | 0

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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))

5 días hace | 0

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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 =...

5 días hace | 0

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