Answered
can i get mex files in matlab format?
Mex files are compiled (i.e., machine language) DLL files. You cannot view them in MATLAB m-file format. If you have the C/C++...

5 years ago | 0

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Answered
I need help obtaining the values c1,c2.c3 from a least squares fit of the data.
It appears to me that your equation is linear in c1, c2, c3. Just make a matrix equation out of this and then apply your least ...

5 years ago | 0

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How to add an NxN matrix with K pages ?
You are correct, sum(A,3) is the correct syntax to use. This sums across the 3rd dimension.

5 years ago | 0

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How do I vectorize matrices of specific modes of a tensor?
Is this what you want? x = your 250 x 250 x 183 array result = reshape(x,250*250,183);

5 years ago | 0

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Why the memory Limitation to a data structure in cpp: size of "XXX::C_SubNetwork::S_ListBuffer [3]" >= 256 Mb and can I raise the limit higher?
This looks like you are declaring this variable as a local variable, in which case the memory for it will come off of the stack....

5 years ago | 0

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mxCreateNumericMatrix and sparse matrix in C/Matlab hybrid programming
Convert the index arrays to double either inside the C code or on the Engine side. E.g., engEvalString(ep, "MS=sparse(double(MI...

5 years ago | 0

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Converting double values file to 2 byte per sample.
If you want a two byte floating point representation you can use half precision. E.g., https://www.mathworks.com/matlabcentral/...

5 years ago | 0

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How can I multiply N dimensional matrices
Other options from the FEX: https://www.mathworks.com/matlabcentral/fileexchange/8773-multiple-matrix-multiplications-with-arra...

5 years ago | 1

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whats difference beetween angvel and rotvec?
I don't have a version of MATLAB installed that has the angvel( ) and rotvec( ) functions, so I can only make an educated guess....

5 years ago | 0

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Strncpy/Strncpy_s is supported by Matlab
Your code has bugs. That is why it is crashing. The bugs are caused by these lines: main(); // You call main without any ...

5 years ago | 0

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Fast conversion of 2 matrices to 1 complex matrix
See this FEX submission for reading and writing interleaved complex data in R2018a or later without extra data copies: https://...

5 years ago | 0

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How to replace leading zeroes by spaces with regexprep
One way: fun = @(x)sprintf(['%' num2str(numel(x)) 'd'],str2double(x)); d = cellfun(fun,a,'uni',false); e = cellfun(fun,b,'uni...

5 years ago | 0

Answered
trimming matrix arrays arranged within cell arrays
It is not clear whether you want the rows or columns trimmed. Maybe one of these is what you want? TrimmedArray = cellfun(@(x) ...

5 years ago | 0

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Runge-Kutta 4th order function error (Matrix dimensions must agree)
Your RK_4 function is not set up to handle vector equations ... it is only set up to handle scalar equations. Also you are not ...

5 years ago | 0

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How to pass arguments by reference from Matlab?
doc loadlibrary Create a C header file that gives prototypes for the Fortran subroutines and treat the Fortran arguments as poi...

5 years ago | 0

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how to create an array of all permutations
If you want all of them in an array (which might be too large if the number of digits is too large), you can use n = number of ...

5 years ago | 0

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Answered
Trying to do calculations for density
Why do you have these lines in your function: P_t=4; P_s=3; H=25; Aren't these variable supposed to be input arguments? See...

5 years ago | 0

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Submitted

freadcomplex and fwritecomplex
Mex routines that read and write interleaved complex data files for MATLAB R2018a or later without extra data copy.

5 years ago | 4 downloads |

5.0 / 5

Answered
efficient ways to read and write complex valued data
A mex routine to accomplish this that doesn't use any hacks can be found here: https://www.mathworks.com/matlabcentral/fileexch...

5 years ago | 0

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Answered
efficient ways to read and write complex valued data
This may not apply to you, but if you have R2018a or later you can just fread( ) into a real variable directly the interleaved d...

5 years ago | 0

Answered
Changing contents of Cell Array mex files
When you mxDestroyArray a cell array or struct array, it does a deep destroy. Meaning all of the cell array or struct array ele...

5 years ago | 0

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Answered
solution with the Runge-Kutta method HELPP
This is clearly a homework/exam question, so I will only offer hints. The code you have posted is for a single scalar different...

5 years ago | 0

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How could I use MATLAB to solve for x with this equation, 0=a*x^(3)+b*x^(-1)+c.
Just use the roots( ) function. If you have a negative integer power of x in the expression such as x^(-n), then multiply every...

5 years ago | 0

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reshape loop resulted cell array
result = cell2mat(c1(:))';

5 years ago | 0

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Answered
Matrix with nested for loops
You don't need loops for this. E.g., p = the probability result = rand(20,20) < p; % your matrix of 0's and 1's

5 years ago | 0

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Answered
Bit xor of two binary strings and conversion into decimal
The xor part as a logical vector result result = str1 ~= str2; Or if you wanted it as char: str3 = char((str1 ~= str2) + '0')...

5 years ago | 0

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Answered
Function 'quatrotate' not supported for code generation.
You can always write your own. Just code up the matrix multiply at the bottom of the doc page: https://www.mathworks.com/help/...

5 years ago | 1

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Reshaping a complex 3D array into 1D, and back
I suspect the problem may be that you originally put the data into rows of a matrix. This separates the elements in memory. I....

5 years ago | 0

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Answered
Problem with function handle
f by itself is just a function handle, not the function handle evaluated for any input. You need to give f an input. E.g., b=...

5 years ago | 1

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Answered
How can I find all possible combinations of rows from two separate arrays?
E.g., For arbitrary values in A and B, doesn't have to be B = -A n = size(A,1); C = repmat({A},2^n,1); mask = dec2bin((0:(2^n...

5 years ago | 0