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Walter Roberson


Last seen: Today Active since 2011

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
I am confused about my code, can you guys please help me to tell me what SVM did I use?
One vs One when you use fitcecoc

3 hours ago | 0

| accepted

Answered
reading trivially sorted images 1 by 1 in loop
imgdir = 'C:\Users\Nikhil\Desktop\Manu Gowda\images'; Then in the loop, basename = sprintf('1mm%04d.jpg', i); im = imread(ful...

6 hours ago | 0

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Answered
How to fully utilize my CPU and GPU for running my code?
When you use 'UseGPU', true then autoencoder trains only on the GPU, with the CPU being used only to manage the training. You c...

6 hours ago | 0

Answered
How to add 'Tone' on digital pin of Arduino Uno?
Tone was not supported until R2019a... the version immediately after the one you are using.

7 hours ago | 0

Answered
I am currently trying the quadcopter project, and I am getting errors in estimatorVars.
There was nothing that said what kind of error it was? Like "file not found" or "out of memory" or wrong datatype or index out o...

7 hours ago | 1

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Answered
Read text file with multiple delimiters in a single row
Your timestamps are too low precision for it to be reasonable that you stop at milliseconds -- you have too many values that are...

10 hours ago | 0

Answered
Creating a table using cell arrays
Results = {randi(9, 11, 1); "R"+randi(9,11,1)} Groups = cellstr(('a':'k').') Table = table(Results{:}, 'RowNames', Groups)

11 hours ago | 0

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Answered
how to convert complex number into double number?
siz=256; x=nan(1,siz+1); %<------------PREALLOCATE!!! y=nan(1,siz+1); %<------------PREALLOCATE!!! Z=0.78;% initial value of ...

1 day ago | 0

Answered
Unable to import txt file
train = fullfile(dataFolder, "train_FD001.txt"); [train_data1, train_labels1] = importdata(train)

1 day ago | 0

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Answered
keeping the variable names same
MATLAB uses Name/Value pairs in which the first element of the pair tells the option name and the second element of the pair ind...

1 day ago | 0

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Answered
remove grid lines completely
filename = 'something.fig'; fig = openfig(filename); ax = findobj(fig, 'type', 'axes'); set(ax, 'XGrid', 'off', 'YGrid', 'off...

1 day ago | 1

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Answered
Detection of pixels in image that are not in focus
"blur" is perceived when there is a loss of detail -- corresponding to loss of high frequency information. If you do a low pas...

1 day ago | 0

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Answered
run the program in matlab
T3=1e-9:1e-9:1e-6; for i=1:numel(T3) t3=T3(i); [b]=fminsearch(@(b) abs(trial0(complex(b(1),b(2)), t3)) ,[1,1]); ...

1 day ago | 0

Answered
How to convert the following UTC to serial date number?
format long g utc_t = '2018-345T02:19:02.175Z' utc_dt = datetime(utc_t, 'InputFormat', "uuuu-DDD'T'HH:mm:ss.SSS'Z'") time = d...

1 day ago | 1

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Answered
extract data from cell array
c{1,1}.name = 'Tom'; c{1,1}.age = 48; c{2,1}.name = 'Bob'; c{2,1}.age = 24; c{3,1}.name = 'Jim'; c{3,1}.age = 12; vec_age = c...

1 day ago | 0

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Answered
Searching word list for key letters
wordList = {'apples' 'orange' 'banana'}; ContainList = 'shu'; NotContainList = 'br'; mask1 = contains(wordList, num...

1 day ago | 0

Answered
How to find index of continous non-NaN values?
mask = ~isnan(Sal(:).'); %row vector needed starts = strfind([false mask], [false true]); stops = strfind([mask false], [true...

1 day ago | 0

Answered
Subs does not do the job
e=sym('e',[J 1]); e would be a vector containing symbols named e1 e2 e3 A=replace(A,'w','e(1)'); That e(1) will not be t...

2 days ago | 0

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Answered
How can I use conv() in a function handle and keep original vector size, but not use 'same'/'valid'?
a = [1,2,3] b = [1,2,3,4,5,6] FirstN = @(V,N) V(1:N) c = @(x) FirstN(conv(a,b(x(1))), numel(a)) However... you are using x(1...

2 days ago | 0

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Answered
Substitute variables in function handle
What you have already done should work. Although all of the function handles will look the same, they would have captured diffe...

2 days ago | 0

Answered
how can i know the programming behind a MATLAB GUI
I can tell from the list of files that what you have is a compiled executable built by MATLAB Compiler. You are not intended to ...

2 days ago | 0

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Answered
Define function with nonlinear equation system vercat error
You have a multi objective search, trying to simultaneously minimize four different objectives. fmincon is only able to minimize...

2 days ago | 0

Answered
How can I set two different color for each lsline in the scatter plot?
lsline creates a least squared line for each scatter plot in the axes. At the time you call lsline the first time you have pl...

2 days ago | 0

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Answered
Distance between points in a graph
pdist() can be configured with a number of different distance metrics. However, I have to wonder if you are assuming that the 5...

3 days ago | 0

Answered
Perhaps a bug in matlab?
It is correct that it should not be giving you the solution. Your equations do not account for the possibility that you might be...

3 days ago | 0

Answered
How can I deploy some GUI (from app designer) into a raspberry pi 4?
No, Application Compiler uses MATLAB Compiler, which can only target (Intel) Linux, (Intel) WIndows, or (Intel) MacOS (ARM MacOS...

3 days ago | 0

Answered
Hello, I have purchased the MatLab_R2021b license (4XXXXXXX, Standard, Perpetual). Does this license include the toolboxes? If it does, how can I download and install them?
If you use Add-On Explorer while you are using that account, then you can navigate to the toolbox you are interested in. If you ...

3 days ago | 0

Answered
exportgraphics streches images whily saving if 'visible' is 'off' - bug?
Figure layout including axes layout (including xlim and ylim) is not performed until the figure visibility is turned on.

3 days ago | 0

Answered
Error using reshape when creating a new cell array in a loop
for j = 1:numel(participants) N = block_size*ceil(numel(participants{j},1)/block_size); participants{j,1}(end+1:N,:) =...

3 days ago | 1

Answered
how to make my text in matlab coloured ?
See the File Exchange contribution named cprintf https://www.mathworks.com/matlabcentral/fileexchange/24093-cprintf-display-for...

4 days ago | 0

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