Answered
Substituting NaN values of one matrix to another?
a = first matrix with NaN values b(isnan(a)) = nan;

13 years ago | 1

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Answered
How to create and store a custom structure from C++ into a matlab data file
E.g., a bare bones code outline: mxArray *mx; mxArray *Set; char *fieldnames[] = {"StrA","StrB","StrC","StrD","StrE...

13 years ago | 0

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Answered
Can I load DLL compiled with unsupported C++ compiler?
You will need to ensure that any other dependencies of the dll (e.g., libraries) are installed on your system and available to t...

13 years ago | 1

Answered
How to sum up a matrix n-times?
n*A ??? You will need to provide a sample input & output so we can understand what you really want.

13 years ago | 1

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Answered
machine precision problem in code
Ben, as many others have already pointed out, this assignment is ill conceived and cannot be accomplished per the reasons others...

13 years ago | 0

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How to obtain fast memory copy of portions in a matrix
I would expect a mex routine might be able to improve the time to copy, maybe by as much as 1/2 since the explicit sub-matrix mA...

14 years ago | 0

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What is the meaning of '* in matlab???
' is conjugate transpose operator * is matrix multiply operator A'*B means conjugate transpose of A multiplied by B, which...

14 years ago | 0

Answered
Cannot find meditor ( for the LIFE OF ME)
meditor was discontinued several years ago. It no longer ships with MATLAB. R2007b was the last version to ship with meditor. (Y...

14 years ago | 0

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Answered
MEX: Problem creating a cell matrix and assign it to the output
Your code: mxSetCell( CellArray_ptr, i, A ); mxDestroyArray( A ); // get rid of this line G...

14 years ago | 0

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Answered
Fast conversion of 2 matrices to 1 complex matrix
For your specific example, the A(1,:,:) and A(2,:,:) data blocks are contiguous memory and, more importantly, were both allocate...

14 years ago | 0

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Answered
initialize a MxN matrix with the same number
Another method if matrix A is not already allocated: A = uninit(M,N); A(:) = some_number; UNINIT can be found here: ...

14 years ago | 2

Answered
Mex file calling LAPACK on MacOS
Don't add the leading underscore yourself ... the compiler will do that. For the trailing underscore you can use a macro. E.g., ...

14 years ago | 0

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how to use mexCallMATLAB with fmincon
1) input[0] should contain the function handle. If you need to create a function handle from within the mex function, you can us...

14 years ago | 0

Answered
numerous "undeclared identifier" errors using MEX
Try putting this at the top of the smoothpatch_curvature_double.c file: #ifndef MWSIZE_MAX #define mwIndex int ...

14 years ago | 0

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Answered
Segmentation Fault When Calling mxGetProperty (not within a MEX routine)
My mxGetPropertyPtr function will not work in a standalone program. It only works in mex routines because it needs mexCallMATLAB...

14 years ago | 0

Answered
Advanced logical matrix indexing
Another variation of Matt J's approach: B = A(:); B(1:(N+1):(N*N)) = []; B = reshape(B,N-1,N);

14 years ago | 1

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Answered
Crash with a mex file, using mxMalloc, mxCalloc and complex vectors
This loop is wrong for the real part sigr: for (i = 0; i<N; i++) { signal[i] = sigr[i]; // should be signal[2*...

14 years ago | 0

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Answered
Crash with a mex file, using mxMalloc, mxCalloc and complex vectors
You use N before you set its value: signal = mxMalloc(2*N*sizeof(mxCOMPLEX)); // Use it here /* get dimensions of t...

14 years ago | 0

Answered
Why is the grass green?
Green is waste light. Grass eats the red light and poops the green light.

14 years ago | 2

Answered
bisection method - can't see error in code
1) Google "bisection method" 2) Go to the 1st Wiki link 3) Look at the pseudo-code posted there 4) Compare that to your...

14 years ago | 2

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Answered
Why does num2str of a single output up to 17 digits?
Point #1: The behavior of num2str is platform specific. On Windows machines (at least the ones I have used), num2str will tr...

14 years ago | 2

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Answered
Matlab crashes in simple MEX C "#pragma omp parallel for" test example
There might be some incompatibility between the OpenMP implementation of your compiler and MATLAB. Maybe try something even simp...

14 years ago | 2

Answered
Pass variable by reference to function
I will ask again what others have already asked. Why do you want the "handle" to the variable? What advice we give you will depe...

14 years ago | 1

Answered
MEX function quesiton: Simple Matrix Row vector multiplication with column vector and summation
In the function sparseMatColVec, you don't initialize int_dv. You just start summing into it. So the result will be garbage unle...

14 years ago | 1

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Answered
How to reshape a matrix
A = zeros(k,l,m,n,o); B = A(:); % column vector C = B.'; % row vector For more general reshaping, see the reshape com...

14 years ago | 0

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Answered
MEX compiler error - not able to compile mexfunction
Get rid of the /fixed option for the compiler (which forces a free format file to be compiled as fixed format ... I still don't ...

14 years ago | 1

Answered
how to switch the value of a boolean.
b = ~a; c = ~b;

14 years ago | 0

Answered
fundamental multiplication problems with Matlab2010-2011!!!!
For educational purposes: >> x = 8.46 x = 8.4600 >> num2strexact(x) ans = 8.4600000000000008526512829121...

14 years ago | 2

Answered
Mex - output error, Make file
That's because you have the '-c' option, which means compile-only. If you want to link into a mex routine get rid of this option...

14 years ago | 1

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Answered
Is there a difference between how LCC compiles a file and how MS visual studo compiles the same file?
LCC is a C compiler, not a C++ compiler. LCC cannot compile C++ code, so I assume that you really have C code and not C++ code. ...

14 years ago | 2