Walter Roberson
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.
C, MATLAB, Shell, Perl, Fortran
Spoken Languages:
English
Statistics
RANK
1
of 250,274
REPUTATION
119,248
CONTRIBUTIONS
34 Questions
53,668 Answers
ANSWER ACCEPTANCE
52.94%
VOTES RECEIVED
15,394
RANK
of 17,386
REPUTATION
N/A
AVERAGE RATING
0.00
CONTRIBUTIONS
0 Files
DOWNLOADS
0
ALL TIME DOWNLOADS
0
CONTRIBUTIONS
0 Posts
CONTRIBUTIONS
0 Public Channels
AVERAGE RATING
CONTRIBUTIONS
0 Highlights
AVERAGE NO. OF LIKES
Top ten contributors whose answers received the most acceptances in 2021
Awarded to Walter Roberson on 01 Jan 2022
Reach 100000 reputation points. Honors the first contributor to reach this milestone, Walter Roberson
Awarded to Walter Roberson on 14 Aug 2020
Solve a problem for the first time
Awarded to Walter Roberson on 10 Jun 2017
Publish your first review
Awarded to Walter Roberson on 09 Oct 2019
The contributor whose answers received the most acceptances in 2019
Awarded to Walter Roberson on 01 Jan 2020
The contributor whose answers received the most acceptances in 2018
Awarded to Walter Roberson on 18 Jan 2019
The contributor whose answers received the most acceptances in 2017
Awarded to Walter Roberson on 02 Jan 2018
Contribute at least one answer each month for 36 consecutive months
Awarded to Walter Roberson on 20 Jul 2017
The contributor whose answers received the most acceptances in 2016
Awarded to Walter Roberson on 20 Jul 2017
The contributor whose answers received the most acceptances in 2015
Awarded to Walter Roberson on 20 Jul 2017
The contributor whose answers received the most acceptances in 2011
Awarded to Walter Roberson on 20 Jul 2017
The contributor whose answers received the most acceptances in 2012
Awarded to Walter Roberson on 20 Jul 2017
Content Feed
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
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
| accepted
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
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
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
| accepted
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
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
| accepted
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
Unable to import txt file
train = fullfile(dataFolder, "train_FD001.txt"); [train_data1, train_labels1] = importdata(train)
1 day ago | 0
| accepted
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
| accepted
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
| accepted
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
| accepted
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
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
| accepted
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
| accepted
Searching word list for key letters
wordList = {'apples' 'orange' 'banana'}; ContainList = 'shu'; NotContainList = 'br'; mask1 = contains(wordList, num...
1 day ago | 0
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
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
| accepted
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
| accepted
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
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
| accepted
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
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
| accepted
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
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
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
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
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
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
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
