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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
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,:) =...

alrededor de 1 hora ago | 0

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...

alrededor de 3 horas ago | 0

Answered
Hello every one, How can I generate randomly only one number between two values (e.g.: 0.01-1)each time?
Remove the fix() call. fix() asks to take the integer portion of the value (rounding towards 0)

alrededor de 3 horas ago | 0

Answered
I have written a code for pressure calculation in bearing. i have found this error. Index in position 1 exceeds array bounds (must not exceed 142). Error in (line 680)
T = (NX+1)*(NY+1); % calling is done as Q(X=1 or Y=2, Node number) for I=1:T x=Q(1,I); y...

alrededor de 4 horas ago | 0

Answered
How to get interval of X for a certain value of Y in a plot or array.
idx = find(y >= 0.3); xmin = x(idx(1)); xmax = x(idx(end));

1 día ago | 0

Answered
How do I convert tall array duration time vector to HH:mm:ss for merging with tall array datetime vector ?
perhaps [h,m,s] = hms(DURATION_COLUMN); DATETIME_COLUMN = TIME_COLUMN + duration(h,m,floor(s)) or perhaps DATETIME_COLUMN = ...

1 día ago | 0

Answered
Can students change scripts in Live Editor without having Matlab installed.
No, they *would* need MATLAB installed for what you describe. However perhaps you can use "MATLAB Online", see http://matlab....

1 día ago | 0

Answered
FMINCON requires the following inputs to be of data type double: 'X0'.
fun = @(x)FCVEC06January2022V2; That says that fun is to become an anonymous function that accepts zero or one input arguments,...

2 días ago | 0

Answered
binary matrix to decimal number
A = [1 0 1 1 0 0 1 0 ] bin2dec(char(A+'0'))

2 días ago | 1

| accepted

Answered
MATLAB function gives me error
Those solid markings appear to me to indicate that you are using a Simulink Bus Creator https://www.mathworks.com/help/simulink/...

2 días ago | 1

Answered
Converting symbols in columns to different numeric values
syms GB KC TB TEN picks1 = [GB TB TEN KC]; orders1 = perms(picks1); GBv = [45; 29; 18; 7]; TBv = [127; 60; 34; 11]; TENv =...

2 días ago | 1

Answered
Is it possible to reconstruct an image from the number of pixel counts and bins information?
I = imread('pout.tif'); imshow(I) I1 = reshape(sort(I), size(I)); imshow(I1) [c,b] = imhist(I); [c1,b1] = imhist(I1); all(...

2 días ago | 0

| accepted

Answered
I need to read an array to see if it has repeated elements (using for loop)
cont =0; for i=1:length(Vec)-1 for j = i+1:length(Vec) if Vec(i) == Vec(j) ...

2 días ago | 0

Answered
How does this function work? - echo, assert ...
The function does none of the actual work needed. Instead it overrides the functions that are used to check that the solution wo...

2 días ago | 2

| accepted

Answered
Run Simulink Simulation from using Matlab Engine API for C
https://www.mathworks.com/help/matlab/calling-matlab-engine-from-c-programs-1.html There is no specific interface for Simulink...

2 días ago | 0

| accepted

Answered
Losing pixels with imrotate
No there is no way. In every case where you rotate by something that is not a multiple of 90 degrees, pixels will change. Con...

2 días ago | 1

Answered
How can I define a symbolic function with vector arguments?
You cannot do that in MATLAB. You can use matlabFunction with the 'vars' option to generate a function handle that indexes in...

3 días ago | 0

Answered
Simplifying results from rat function
[N,D] = rat(0.642857142857143)

3 días ago | 1

| accepted

Answered
How to shifting or move the time axis to the left in a MATLAB plot.
Pass the coordinates of the independent axes to plot() before the dependent coordinates -- plot(x,y)

3 días ago | 0

Answered
Unable to find explicit solution
If you look carefully at the graph, you can see a couple of discontinuities at negative t values. At first I thought it was a ...

3 días ago | 0

Answered
Hi, I wanted to implement MATLAB code "the scrambled pixel value is further converted to binary information sequence of size 8 bits ".
https://www.mathworks.com/matlabcentral/answers/527513-converting-image-to-bits-and-vice-versa#comment_1942575

3 días ago | 0

Answered
pathdef.m dont execute in 2020a
User turns out to have F:\feature.m that is interfering with use of system_dependent()

3 días ago | 1

| accepted

Answered
How to put conditions to use data from command window
Assuming that CD is a scalar, and that AB and BC are column vectors and that Speed is a row vector: statuses = ["unsuccessful",...

3 días ago | 0

Answered
Need Help Understanding a Line of Code Related to Strings
c.simcmd = 'set path=($path /cad/cadence/IC615.06.15.502.lnx/tools/bin); /cad/cadence/MMSIM13.ISR12.11.292.lnx86/tools/bin/spect...

4 días ago | 1

Answered
Symbolic summation of vectors/matrices
In MATLAB, it is tempting to use symsum(), but unfortunately that will not work. The difficulty is that the variable of summatio...

4 días ago | 1

| accepted

Answered
how to convert an image into bits???
reshape() to reconstruct the image. The remote side will need to know the image size, so either the size will need to be fixed o...

4 días ago | 0

Answered
I dont understand, i try to use solve to find x in Matlab Function Block
@Benjamin has shown you how to solve the equation using syms However, syms requires the MATLAB Interpreter, and so is only ava...

5 días ago | 0

| accepted

Answered
Symbols to numeric values
I already showed you X = double(sol.X) Y = double(sol.Y) Z = double(sol.Z) ... about 11 hours ago. To get that format of di...

5 días ago | 1

Answered
Unique workspace for each instance of Interpreted MATLAB Function block?
https://www.mathworks.com/help/simulink/ug/model-global-data-using-data-stores.html "In this example, the top model uses a sig...

5 días ago | 0

Answered
Is it possible to process the sparse matrix faster with vectorization instead of for loop?
Point_Data = readmatrixread('E:\pointdata.txt'); % Point Data = xyz coordinate data of 3D points r = 4; mdl = KDTreeSearcher...

5 días ago | 0

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