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Create prototypes to wrap agains C-Interface DLL - How universal ist the pcwin64.dll created?
The shipping the generated prototype file and compiled thunk file is the recommenced way to distribute code that uses loadlibrar...

8 years ago | 0

Answered
Maximum recursion limit of 500 reached
Is sdpvar a class and does it have a reshape method? If so it is getting called in a way that is causing it to call itself inf...

8 years ago | 0

Answered
My Student Version of MATLAB cant invert 20x20 matrices or "\" 100x100 matrices
Check out this answer http://www.mathworks.com/matlabcentral/answers/138692-matrix-multiply-crashes-matlab-2014a-on-a-amd-a6-145...

8 years ago | 1

Answered
I wrote 2 snippets as below, they both try to find minimum value, but one repetitively uses function handles and the other uses a sub function. It turns out the speed are very different? Why?
Profile your code, think about what the code is doing. Method2 makes one function call to subfun per iteration. Method1 makes...

8 years ago | 0

Answered
Dual Xeon and Matlab R2015b - different behaviour on physical vs virtual machine
MATLAB attempts to detect hyper-threading and may choose not use it. We have found that, for the well optimized math libraries,...

8 years ago | 2

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Error "Matrix index is out of range for deletion" with dynamic variable names but not hardcoded names?
The code blocks are not doing the same thing. Your loop is doing: uniquefields.('L')('removeL') = [] It could be fixe...

8 years ago | 0

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Answered
calllib issue , change DMA buffer value
Try: pointer.value(:)=pattern2; Assigning directly to |pointer.value| is the same as |buffer=pattern2| in c which repla...

8 years ago | 0

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Answered
Why is my MATLAB R2015b installation 56GB in size?
How is the card formatted? What is the output of chkdsk on the card? If the card is formatted fat32 or exFAT (default for SD...

8 years ago | 2

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Answered
Can Windows version of Matlab be made to generate crash report without human intervention?
There is no documented way to do this in R2015b. I suggest you make a formal request for this feature to support.

8 years ago | 0

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Answered
unloadlibrary still keeps the library loaded!
The problem most is most likely with your library not with MATLAB. When a library is loaded the operating system increases the ...

8 years ago | 0

Answered
"Reshaping" matrix
Simpler and faster solution get rid of the outer loop: xgrid3=NaN(A,D,B); tic for j=1:B xgrid3(:,:,j)=xgrid(P_ind(:...

8 years ago | 0

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Answered
How to get find() results as a matrix?
How about: [ind(:,1),ind(:,2)]=find(I);

8 years ago | 1

Answered
What can be done to reduce memory usage in MATLAB R2015b?
Do you use/run code that is really data? For instance does some function generate MATLAB code files dynamically that are later ...

8 years ago | 0

Answered
"depth" of mexMakeArrayPersistent ?
mexMakeArrayPersistent should only be called on the top level cell array or structure. When an mxArray is placed in a cell or f...

8 years ago | 1

Answered
Array of stuctures for repeated use in DLL
This should not make any difference but you might try this code instead. ... structs1 = libstruct('my_struct', tmp); ...

8 years ago | 0

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Does loadlibrary function loads all the functions in one dll?
Yes, by default loadlibrary will load all functions found in the header file used to load or create the prototype file. The fu...

8 years ago | 2

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Answered
Why cant i loadlibrary with relative paths
Loadlibrary runs from a freshly created temporary directory so relative paths will not work as include paths. To build an inc...

8 years ago | 0

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Answered
Order of magnitude (10 times greater) execution time resulting from order of computations in a script file that are otherwise identical.
This appears to be a bug/limitation in the 64 bit JIT in MATLAB versions prior to R2015b. Other versions of MATLAB don't show t...

8 years ago | 2

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usage of calllib, libpointer, and libstruct with DLL that returns memory
You should be able to do what you are trying to do but have a bug or design flaw. It is best to keep all memory in a single s...

8 years ago | 1

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Answered
H5L.iterate exception and behavior of native matlab functions() method
I do not know why H5L.iterate needs function handles with a file defined. I suggest you file an enhancement request to remove t...

8 years ago | 0

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Answered
clear persistent variables in sub-functions
I would not use a perstent variable for this. Use a nested function and local variable function temp = MyMainFunction() ...

8 years ago | 1

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MATLAB's R2015b new JIT experiences a severe degradation in speed in the following example, but the documentation says it was significantly improved. Why would the following simple code run so much slower?
The old (PreR2015b) JIT was highly optimized for a few simple code situations and fell back to the interpreter when it could do ...

8 years ago | 3

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Answered
load a mtalb compiled dll in matlb
You can't, Loading a MATLAB compiled application directly into MATLAB is deliberately prevented. Quote from loadlibrary limi...

8 years ago | 0

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Answered
/D_CRT_SECURE_NO_DEPRECATE /D_SCL_SECURE_NO_DEPRECATE /D_SECURE_SCL=0 >>>>>>>when loading dll
extern "C" { Is c++ not c code. Loadlibrary is only compatible with c headers. Most likely this header can be fixed to be...

8 years ago | 0

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specify compiler used by loadlibrary
The compiler used is the one configured/found with mex -setup. This answer may help if you need to modify your configuration: <...

8 years ago | 0

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Assistance trying to load 3rd party dll/headers into Matlab
Only use addheader when a function you want does not appear in libfunctions or the prototype file. Find the header containing t...

8 years ago | 0

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Error using calllib Too many inputs passed to SimpleFunctionThunk.
Calltype of 'cdecl' is not supported on 64 bit systems however it does work for simple functions with a *limited* number of inte...

8 years ago | 0

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Questions regarding preallocation and much more
The problem here is that the shape of the output and the algorithm determine the number of times the array needs to be reallocat...

8 years ago | 0

Answered
Returning mxArray* as void* from a C shared library
Passing mxArrays via void pointers is likely to cause problems in your code (memory leaks and crashes). The calllib code has sp...

8 years ago | 0

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Answered
loadlibrary mfilename put in sub folder
The thunk file can be placed anywhere by adding the thunkfilename option with a path to the desired location. The only way to c...

8 years ago | 1

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