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Walter Roberson


42.902 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
Can symbolic vectors (not vectors of symbols) be defined and manipulated in the Symbolic Math Toolbox?
No this is not possible. Any variable name is expanded to its contents and any symbolic variable names left are assumed to refer...

circa 4 ore ago | 0

Answered
How to convert .oct file into jpeg format
pwd will be a fully qualified path. When you fullfile with pwd as the first parameter and D: as the second you are concatenating...

circa 4 ore ago | 0

Answered
Output argument y issue
Your methods are not static. Input to shift is a sequence object, which you need to extract the data property of.

circa 4 ore ago | 0

Answered
How to convert 0xffff to -1?
typecast(uint16(hex2dec('ffff')), 'int16')

circa 4 ore ago | 0

Answered
Changing String Name in a For Loop
In that line replace .item_(i) with .(sprintf('item_%d', i)) The () are important for this purpose.

circa 4 ore ago | 1

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)

circa 16 ore ago | 1

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

circa 18 ore 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 giorni 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 giorni ago | 0

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

2 giorni 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.

3 giorni 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 giorni ago | 1

| accepted

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

3 giorni 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...

4 giorni 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...

4 giorni 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...

4 giorni 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)));

4 giorni 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...

4 giorni ago | 0

| accepted

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

5 giorni ago | 0

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

5 giorni 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...

5 giorni 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 giorni 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 ...

6 giorni 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...

6 giorni ago | 1

| accepted

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

6 giorni 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,...

6 giorni 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...

6 giorni ago | 0

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

6 giorni 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...

6 giorni 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...

6 giorni ago | 1

| accepted

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