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Walter Roberson


42.897 total contributions 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.

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Answered
Upgrade from student to standard or home license
Sorry, there is no upgrade path available (at least not as far as I can tell)

ongeveer 6 uur ago | 1

Answered
how to extract data from metadata in matlab?
https://www.mathworks.com/help/matlab/hdf5-files.html

ongeveer 8 uur ago | 0

Answered
How can I sort the filenames in order given by dir()? I cannot turn a structure into a character array which means I cannot use sort, any tiips?
https://www.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort

2 dagen ago | 0

Answered
How can an equation be obtained using four series of data?
"That is, when we put the data of the other columns in the equation, we get the ET value." You are not likely going to be able ...

2 dagen ago | 0

Answered
HOW I CAN REMOVE THE SPACE
yourstring(yourstring == ' ') = '' ;

2 dagen ago | 0

Answered
Solving System of linear equations of the Matrix of Matrices Form
You will need to write the code yourself. Mupad has no built in mathematical functions for matrices of matrices.

2 dagen ago | 0

Answered
Scatter3 appears to require categorical values
I predict that you are doing this on top of an existing axes that had categorical values on the x axes. You cannot mix categoric...

3 dagen ago | 1

| accepted

Answered
How to transform an array into a bottom triangle
squareform() ?

3 dagen ago | 0

Answered
Different polyfit / polyval
The two results do not need to be same. When you use the version that outputs mu then you would pass mu in to polyval. The ve...

3 dagen ago | 0

Answered
Computer replacement - can I install Matlab on another computer without uninstalling the program from the broken computer?
There is a procedure for deactivating a computer that is no longer available. You have to click to certify the reason. If the ol...

3 dagen ago | 0

Answered
Store all user inputs from a loop + how to make the loop non-repeated
english = importdata('testing.xlsx'); Ntry = 10; b = cell(Ntry, 1); word_order = randperm(numel(english), Ntry); for k...

3 dagen ago | 0

| accepted

Answered
Convert Values From Cell Elements to String Elements for Complete Array
mask = cellfun(@ischar, raw); raw(mask) = num2cell(string(raw(mask)));

3 dagen ago | 0

| accepted

Answered
Is the Network License Manager Server Allowed on Public IP Space?
Yes, it can be on public IP. However, you can only serve members of your own organization (or perhaps some collaborators, when t...

3 dagen ago | 0

| accepted

Answered
extracting coordinates numbers from array of coordinates
textscan does not permit cell array inputs as the first parameter.

4 dagen ago | 0

Answered
how to write in matlab?
flag(j) = 1;

4 dagen ago | 0

Answered
Non-monotonic interpolation error
No, there is no way to solve that problem. The process of interpolating changes the data, so even if you did not have the non-mo...

4 dagen ago | 1

Answered
Why do I get this error since there is only one function?
This happens when a script file with that name contains a function definition with the same name. Which can also happen in what ...

5 dagen ago | 2

| accepted

Answered
Many functions in a large script file
"I am wondered how can I add nested functions in a parent function in a while loop. Is that possible?" No. functions cannot be ...

5 dagen ago | 0

| accepted

Answered
cannot call m-file in another m-file
y = 2x + 3; 2x is not a valid variable name in MATLAB, and it is not a valid way to write a number in MATLAB. Like the error m...

5 dagen ago | 1

| accepted

Answered
Clustering Calculating total value
C1 = C(1,1:2); C2 = C(1, 3:4); X = YourArray - C1;

5 dagen ago | 0

Answered
Solver execution time is very slow.
tic syms a1 a2 a3 eqns = [a1 + 0.01 * (a2 + a3) - 5, a2 + 0.01 * (a1 + a3) - 6, a3 + 0.01 * (a2 + a1) - 7]; sol = solve(eqns,...

5 dagen ago | 0

Answered
Inquiry MISRA C 2012 6.1
You have a problem. http://port70.net/~nsz/c/c89/c89-draft.html#3.5.2.1 A bit-field may have type int , unsigned int , or sig...

5 dagen ago | 0

Answered
how to take mean of every second data in a minute and an hourly?
TT2 = retime(TT1, 'minute', @std);

5 dagen ago | 1

Answered
How do I convert to Mex from Cpp using Xcode ver 10
Your SegmentBoneDP.cpp file is the source code. If you need something that converts C++ code into MATLAB code, then you are usi...

5 dagen ago | 1

| accepted

Answered
How to solve a system of two non-linear equations symbolically
sol = solve(L0 -1 +a*L1^(a-1) -a*A*L0^(a-1)==0, L1 -1 -a*L1^(a-1) +a*A*L0^(a-1)==0,'returnconditions',true); sol = stru...

5 dagen ago | 1

| accepted

Answered
How to show the legends of this plot?
Record the handles of the objects you are going to produce legend() entries for. Pass those handles to legend() as the first par...

6 dagen ago | 1

Answered
How to fix MATLAB errors arise from changing the search path?
"I usually saved my projects in C:\Program Files\MATLAB\R2016a\bin" You have corrupted MATLAB . You need to move your projects ...

6 dagen ago | 0

| accepted

Answered
How do I change the color of the markers in the legend in a scatter plot with colormap?
Most of the time, using legend() together with scatter() will not give you the results you want. The work-around is to deliber...

6 dagen ago | 0

| accepted

Answered
Leave out dot notation in table variables
The closest MATLAB equivalent is import but it only applies for packages https://www.mathworks.com/help/matlab/matlab_oop/scopin...

6 dagen ago | 0

Answered
How to copy every 500 rows to a new variable?
result = squeeze(cellfun(@transpose, num2cell(reshape(YourMatrix.', size(YourMatrix,2), 500, []), [1 2]), 'uniform', 0)); This ...

6 dagen ago | 0

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