Walter Roberson

Last seen: Today | 自 2011 起处于活动状态

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

2 hours 前 | 0

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

2 hours 前 | 0

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

19 hours 前 | 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...

22 hours 前 | 0

已回答
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...

22 hours 前 | 0

| 已接受

已回答
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 day 前 | 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 day 前 | 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 day 前 | 0

已回答
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 day 前 | 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 day 前 | 0

| 已接受

已回答
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 days 前 | 0

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

2 days 前 | 0

已回答
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 days 前 | 0

| 已接受

已回答
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 days 前 | 0

已回答
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 days 前 | 0

已回答
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 days 前 | 0

已回答
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 days 前 | 0

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

3 days 前 | 0

| 已接受

已回答
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 days 前 | 0

| 已接受

已回答
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 days 前 | 1

| 已接受

已回答
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 days 前 | 0

| 已接受

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

3 days 前 | 0

已回答
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 days 前 | 1

已回答
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 days 前 | 0

| 已接受

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

4 days 前 | 0

已回答
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 days 前 | 0

已回答
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 days 前 | 0

已回答
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 days 前 | 0

| 已接受

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

6 days 前 | 0

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

6 days 前 | 0

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