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Numerical Solution of the System of four Coupled Nonlinear ODEs by Runge-Kutta Fourth Order Method
I will point out some problems, and then suggest a much easier way to do this. Start with your first couple of lines in the loo...

oltre 5 anni fa | 0

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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++...

oltre 5 anni fa | 0

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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 ...

oltre 5 anni fa | 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.

oltre 5 anni fa | 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);

oltre 5 anni fa | 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....

oltre 5 anni fa | 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...

oltre 5 anni fa | 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/...

oltre 5 anni fa | 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...

oltre 5 anni fa | 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....

oltre 5 anni fa | 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 ...

oltre 5 anni fa | 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://...

oltre 5 anni fa | 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...

oltre 5 anni fa | 0

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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) ...

oltre 5 anni fa | 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 ...

oltre 5 anni fa | 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...

oltre 5 anni fa | 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 ...

oltre 5 anni fa | 0

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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...

oltre 5 anni fa | 0

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Inviato


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

oltre 5 anni fa | 4 download |

5.0 / 5

Risposto
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...

oltre 5 anni fa | 0

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Risposto
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...

oltre 5 anni fa | 0

Risposto
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...

oltre 5 anni fa | 0

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Risposto
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...

oltre 5 anni fa | 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...

oltre 5 anni fa | 0

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

oltre 5 anni fa | 0

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Risposto
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

oltre 5 anni fa | 0

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Risposto
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')...

oltre 5 anni fa | 0

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Risposto
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/...

oltre 5 anni fa | 1

Risposto
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....

quasi 6 anni fa | 0

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Risposto
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=...

quasi 6 anni fa | 1

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