mex matlab function c++ gives wrong answer relative to R c++ function
I've got an issue that I cannot get the answer after mex'ing c++ function. It gives zeros always no matter what.
code:
https://github.com/jstriaukas/codequestions/tree/master/code
main.m gives the answer in matlab. linSolver.cpp contains mexFunction that I think I made a mistake in but cannot find it. Any ideas?
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I am trying to print out the time using the code below:
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I've been trying to extract the values from a loop for a while but it seems I just can't find the answer.
To make it simple, here is the code I'm using in R programme:
seatsInitial <- function (df,x,y) { for (i in ModQuota) { filtered = subset(df, Poll> x) OnlyPoll <- filtered$Poll Calculus <- OnlyPoll/i Calculus2 <- floor(Calculus) print(Calculus2) if(sum(Calculus2) == y) stop("WE GOT IT") } }Then, to get the results:
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If I run the loop, I get the following results (showing only the last 5 lines of the output here):
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Much thanks in advance.
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Expected ';', ',' or ')' before '=' token while building a MEX-file
I'm hoping for help installing Andreas Mueller's MATLAB bindings for Global Probability of Boundary.
I hope that my issue is not deeply ingrained in my installation, so I'll describe the immediate problem first, with the following paragraph noting some attempts at implementation.
According to Mueller's instructions in the readme, I did my best to install CUDA, ACML, and GCC (currently working on RHEL 7). After a successful build/install of the library
libdamascene.so, I included a txt file in/etc/ld.so.conf.d/which includes the path oflibdamascene.so. It shows up when I useldconfig -p | grep libdamascene.so.When I open up MATLAB and try to build the MEX-file (using GCC 6.3) I get
Error using mex: In file included from ../damascene-python-and-matlab-bindings-master/bindings/gpb_mex.c: 3: 0: ../damascene-python-and-matlab-bindings-master/bindings/gpb.h: 10: 143: error: expected ';', ',' or ')' before '=' token void gpb(const unsigned int* in)image, unsigned int width, unsigned int height, float* border, int*textons, float* orientations, int device_num=0);And a couple of subsequent errors that I gather are from the fact that the compiler wasn't able to properly read the header.
One thing I tried to do was to simply remove the declaration of
device_num = 0and place explicitly initialize it in thegpb_mex.cfunction call. This result is more nebulous.Error using mex /tmp/mex_1295917814264136_135235/gpb_mex.o: In function 'mexFunction': gpb_mex.c: (.text+0x161): undefined reference to gpb collect2: error: ld returned 1 exit status.This error makes me thing that theres a problem with my library, which is a little more challenging to debug. I won't put all the things I tried (available on demand) to get a successful build of the library but let me summarize:
- I'm running CUDA 9.0, not CUDA 8.0.
- I'm running the
gpuacmlfrom the AMD Open64 SDK (only one I could find). - I had to change the
gpu_architecturein theCMakelists.txtmaster file fromsm_20tosm_70. - I have a separate installation of GCC 6.3.0 (and GCC 5.3.0) so I can build the library.
My biggest question is: do you think this indeed a matter of an incorrectly built library or is there something else missing. Is there any way I can check if the library
libdamascene.sois working correctly? Please let me know how I can clarify my situation. Thank you so much!Edit: I am including additional data.
Here's MATLAB output when I try to compile the MEX-file.
mex -v GCC='/usr/bin/gcc63' G++='/usr/bin/g++63' gpb_mex.c Verbose mode is on. ... Looking for compiler 'gcc' ... ... Executing command 'which gcc' ...Yes ('/usr/bin/gcc'). ... Executing command 'gcc -print-file-name=libstdc++.so' ...Yes ('/usr/lib/gcc/x86_64-redhat-linux/4.8.5/libstdc++.so'). Found installed compiler 'gcc'. Options file details ------------------------------------------------------------------- Compiler location: /usr/bin/gcc63 Options file: /home/clusterbomb/.matlab/R2018b/mex_C_glnxa64.xml CMDLINE2 : /usr/bin/gcc63 -pthread -Wl,--no-undefined -Wl,-rpath-link,/usr/local/MATLAB/R2018b/bin/glnxa64 -shared -O -Wl,--version-script,"/usr/local/MATLAB/R2018b/extern/lib/glnxa64/c_exportsmexfileversion.map" /tmp/mex_1326595352957888_135235/gpb_mex.o /tmp/mex_1326595352957888_135235/c_mexapi_version.o -L"/usr/local/MATLAB/R2018b/bin/glnxa64" -lmx -lmex -lmat -lm -lstdc++ -o gpb_mex.mexa64 CC : /usr/bin/gcc63 DEFINES : -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE MATLABMEX : -DMATLAB_MEX_FILE CFLAGS : -fexceptions -fPIC -fno-omit-frame-pointer -pthread INCLUDE : -I"/usr/local/MATLAB/R2018b/extern/include" -I"/usr/local/MATLAB/R2018b/simulink/include" COPTIMFLAGS : -O2 -fwrapv -DNDEBUG CDEBUGFLAGS : -g LD : /usr/bin/gcc63 LDFLAGS : -pthread -Wl,--no-undefined -Wl,-rpath-link,/usr/local/MATLAB/R2018b/bin/glnxa64 LDTYPE : -shared FUNCTIONMAP : "/usr/local/MATLAB/R2018b/extern/lib/glnxa64/mexFunction.map" VERSIONMAP : "/usr/local/MATLAB/R2018b/extern/lib/glnxa64/c_exportsmexfileversion.map" LINKEXPORT : -Wl,--version-script,"/usr/local/MATLAB/R2018b/extern/lib/glnxa64/mexFunction.map" LINKEXPORTVER : -Wl,--version-script,"/usr/local/MATLAB/R2018b/extern/lib/glnxa64/c_exportsmexfileversion.map" LINKLIBS : -L"/usr/local/MATLAB/R2018b/bin/glnxa64" -lmx -lmex -lmat -lm -lstdc++ LDOPTIMFLAGS : -O LDDEBUGFLAGS : -g MWCPPLIB : "/usr/local/MATLAB/R2018b/sys/os/glnxa64/libstdc++.so.6" OBJEXT : .o LDEXT : .mexa64 SETENV : CC="/usr/bin/gcc63" CXX="g++" CFLAGS="-fexceptions -fPIC -fno-omit-frame-pointer -pthread -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE " CXXFLAGS="-fexceptions -fPIC -fno-omit-frame-pointer -pthread -std=c++11 -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE " COPTIMFLAGS="-O2 -fwrapv -DNDEBUG" CXXOPTIMFLAGS="-O2 -fwrapv -DNDEBUG" CDEBUGFLAGS="-g" CXXDEBUGFLAGS="-g" LD="/usr/bin/gcc63" LDXX="g++" LDFLAGS="-pthread -Wl,--no-undefined -Wl,-rpath-link,/usr/local/MATLAB/R2018b/bin/glnxa64 -shared -L"/usr/local/MATLAB/R2018b/bin/glnxa64" -lmx -lmex -lmat -lm -lstdc++ -Wl,--version-script,"/usr/local/MATLAB/R2018b/extern/lib/glnxa64/mexFunction.map"" LDDEBUGFLAGS="-g" GCC : /usr/bin/gcc63 CPPLIBS : /usr/lib/gcc/x86_64-redhat-linux/4.8.5/libstdc++.so MATLABROOT : /usr/local/MATLAB/R2018b ARCH : glnxa64 SRC : "/home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/bindings/gpb_mex.c";"/usr/local/MATLAB/R2018b/extern/version/c_mexapi_version.c" OBJ : /tmp/mex_1326595352957888_135235/gpb_mex.o;/tmp/mex_1326595352957888_135235/c_mexapi_version.o OBJS : /tmp/mex_1326595352957888_135235/gpb_mex.o /tmp/mex_1326595352957888_135235/c_mexapi_version.o SRCROOT : /home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/bindings/gpb_mex DEF : /tmp/mex_1326595352957888_135235/gpb_mex.def EXP : "gpb_mex.exp" LIB : "gpb_mex.lib" EXE : gpb_mex.mexa64 ILK : "gpb_mex.ilk" MANIFEST : "gpb_mex.mexa64.manifest" TEMPNAME : gpb_mex EXEDIR : EXENAME : gpb_mex G++ : /usr/bin/g++63 OPTIM : -O2 -fwrapv -DNDEBUG LINKOPTIM : -O CMDLINE1_0 : /usr/bin/gcc63 -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2018b/extern/include" -I"/usr/local/MATLAB/R2018b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -O2 -fwrapv -DNDEBUG "/home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/bindings/gpb_mex.c" -o /tmp/mex_1326595352957888_135235/gpb_mex.o CMDLINE1_1 : /usr/bin/gcc63 -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2018b/extern/include" -I"/usr/local/MATLAB/R2018b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -O2 -fwrapv -DNDEBUG "/usr/local/MATLAB/R2018b/extern/version/c_mexapi_version.c" -o /tmp/mex_1326595352957888_135235/c_mexapi_version.o ------------------------------------------------------------------- Building with 'gcc'. /usr/bin/gcc63 -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2018b/extern/include" -I"/usr/local/MATLAB/R2018b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -O2 -fwrapv -DNDEBUG "/home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/bindings/gpb_mex.c" -o /tmp/mex_1326595352957888_135235/gpb_mex.o /usr/bin/gcc63 -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2018b/extern/include" -I"/usr/local/MATLAB/R2018b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -O2 -fwrapv -DNDEBUG "/usr/local/MATLAB/R2018b/extern/version/c_mexapi_version.c" -o /tmp/mex_1326595352957888_135235/c_mexapi_version.o /usr/bin/gcc63 -pthread -Wl,--no-undefined -Wl,-rpath-link,/usr/local/MATLAB/R2018b/bin/glnxa64 -shared -O -Wl,--version-script,"/usr/local/MATLAB/R2018b/extern/lib/glnxa64/c_exportsmexfileversion.map" /tmp/mex_1326595352957888_135235/gpb_mex.o /tmp/mex_1326595352957888_135235/c_mexapi_version.o -L"/usr/local/MATLAB/R2018b/bin/glnxa64" -lmx -lmex -lmat -lm -lstdc++ -o gpb_mex.mexa64 Error using mex /tmp/mex_1326595352957888_135235/gpb_mex.o: In function `mexFunction': gpb_mex.c:(.text+0x161): undefined reference to `gpb' collect2: error: ld returned 1 exit statusHere's the header file
gpb.h(with edit of removingdevice_num=0):void gpb(const unsigned int* in_image,unsigned int width,unsigned int height, float* border, int* textons, float* orientations, int device_num);Here's the
gpb_mex.cfile with the alteration of addition the declareddevice_numin the final line:#include <mex.h> #include "gpb.h" void mexFunction(int nOut, mxArray *pOut[], int nIn, const mxArray *pIn[]) { mwSize width, height; float* borders; float* orientations; int* textons; unsigned int *in_image; mwSize dims[3]; mwSize orientation_dims[3]; if((nIn != 1) || (nOut != 3)) mexErrMsgTxt("Usage: border,textons,orientations = gpb(image)"); if (!mxIsClass(pIn[0],"uint8") || mxGetNumberOfDimensions(pIn[0]) != 3) { mexErrMsgTxt("Usage: th argument must be a unsigned int matrix"); } const mwSize *indims= mxGetDimensions(pIn[0]); if (indims[0]!=4) mexErrMsgTxt("Image needs to be of shape 4 x widht x height"); width = indims[2]; height = indims[1]; mexPrintf("width %d, height %d\n",width,height); mexPrintf("Element-size: %d, sizeof(int): %d, sizeof(char) %d\n",mxGetElementSize(pIn[0]),sizeof(int),sizeof(unsigned char)); dims[0]=width; dims[1]=height; //for rgb0 mexPrintf("width: %d height: %d\n",width, height); pOut[0]=mxCreateNumericMatrix(height,width,mxSINGLE_CLASS,mxREAL); pOut[1]=mxCreateNumericMatrix(height,width,mxINT32_CLASS,mxREAL); orientation_dims[0]=width; orientation_dims[1]=height; orientation_dims[2]=8; pOut[2]=mxCreateNumericArray(3,orientation_dims,mxSINGLE_CLASS,mxREAL); borders=(float*) mxGetPr(pOut[0]); textons=(int*) mxGetPr(pOut[1]); orientations=(float*) mxGetPr(pOut[2]); in_image = (unsigned int*) mxGetData(pIn[0]); gpb(in_image,height,width,borders,textons,orientations, 0); }Happy to provide any more source code as need, but the rest would be ripped straight from amueller's repository (link above).
Edit 2:
using -L resulted in a permission error, which I resolved by
sudo chmod 755 libdamascene.soin linux terminal.So the good news is that matlab was able to find libdamascene, evidenced by it moving forward after permission denied. Unfortunately, the compiler is still struggling.
mex -v GCC='/usr/bin/gcc63' gpb_mex.c -L</home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/build/libdamascene.so> Verbose mode is on. ... Looking for compiler 'gcc' ... ... Executing command 'which gcc' ...Yes ('/usr/bin/gcc'). ... Executing command 'gcc -print-file-name=libstdc++.so' ...Yes ('/usr/lib/gcc/x86_64-redhat-linux/4.8.5/libstdc++.so'). Found installed compiler 'gcc'. Options file details ------------------------------------------------------------------- Compiler location: /usr/bin/gcc63 Options file: /home/clusterbomb/.matlab/R2018b/mex_C_glnxa64.xml CMDLINE2 : /usr/bin/gcc63 -pthread -Wl,--no-undefined -Wl,-rpath-link,/usr/local/MATLAB/R2018b/bin/glnxa64 -shared -O -Wl,--version-script,"/usr/local/MATLAB/R2018b/extern/lib/glnxa64/c_exportsmexfileversion.map" /tmp/mex_1363958469865432_171081/gpb_mex.o /tmp/mex_1363958469865432_171081/c_mexapi_version.o -L</home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/build/libdamascene.so> -L"/usr/local/MATLAB/R2018b/bin/glnxa64" -lmx -lmex -lmat -lm -lstdc++ -o gpb_mex.mexa64 CC : /usr/bin/gcc63 DEFINES : -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE MATLABMEX : -DMATLAB_MEX_FILE CFLAGS : -fexceptions -fPIC -fno-omit-frame-pointer -pthread INCLUDE : -I"/usr/local/MATLAB/R2018b/extern/include" -I"/usr/local/MATLAB/R2018b/simulink/include" COPTIMFLAGS : -O2 -fwrapv -DNDEBUG CDEBUGFLAGS : -g LD : /usr/bin/gcc63 LDFLAGS : -pthread -Wl,--no-undefined -Wl,-rpath-link,/usr/local/MATLAB/R2018b/bin/glnxa64 LDTYPE : -shared FUNCTIONMAP : "/usr/local/MATLAB/R2018b/extern/lib/glnxa64/mexFunction.map" VERSIONMAP : "/usr/local/MATLAB/R2018b/extern/lib/glnxa64/c_exportsmexfileversion.map" LINKEXPORT : -Wl,--version-script,"/usr/local/MATLAB/R2018b/extern/lib/glnxa64/mexFunction.map" LINKEXPORTVER : -Wl,--version-script,"/usr/local/MATLAB/R2018b/extern/lib/glnxa64/c_exportsmexfileversion.map" LINKLIBS : -L</home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/build/libdamascene.so> -L"/usr/local/MATLAB/R2018b/bin/glnxa64" -lmx -lmex -lmat -lm -lstdc++ LDOPTIMFLAGS : -O LDDEBUGFLAGS : -g MWCPPLIB : "/usr/local/MATLAB/R2018b/sys/os/glnxa64/libstdc++.so.6" OBJEXT : .o LDEXT : .mexa64 SETENV : CC="/usr/bin/gcc63" CXX="g++" CFLAGS="-fexceptions -fPIC -fno-omit-frame-pointer -pthread -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE " CXXFLAGS="-fexceptions -fPIC -fno-omit-frame-pointer -pthread -std=c++11 -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE " COPTIMFLAGS="-O2 -fwrapv -DNDEBUG" CXXOPTIMFLAGS="-O2 -fwrapv -DNDEBUG" CDEBUGFLAGS="-g" CXXDEBUGFLAGS="-g" LD="/usr/bin/gcc63" LDXX="g++" LDFLAGS="-pthread -Wl,--no-undefined -Wl,-rpath-link,/usr/local/MATLAB/R2018b/bin/glnxa64 -shared -L</home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/build/libdamascene.so> -L"/usr/local/MATLAB/R2018b/bin/glnxa64" -lmx -lmex -lmat -lm -lstdc++ -Wl,--version-script,"/usr/local/MATLAB/R2018b/extern/lib/glnxa64/mexFunction.map"" LDDEBUGFLAGS="-g" GCC : /usr/bin/gcc63 CPPLIBS : /usr/lib/gcc/x86_64-redhat-linux/4.8.5/libstdc++.so MATLABROOT : /usr/local/MATLAB/R2018b ARCH : glnxa64 SRC : "/home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/bindings/gpb_mex.c";"/usr/local/MATLAB/R2018b/extern/version/c_mexapi_version.c" OBJ : /tmp/mex_1363958469865432_171081/gpb_mex.o;/tmp/mex_1363958469865432_171081/c_mexapi_version.o OBJS : /tmp/mex_1363958469865432_171081/gpb_mex.o /tmp/mex_1363958469865432_171081/c_mexapi_version.o SRCROOT : /home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/bindings/gpb_mex DEF : /tmp/mex_1363958469865432_171081/gpb_mex.def EXP : "gpb_mex.exp" LIB : "gpb_mex.lib" EXE : gpb_mex.mexa64 ILK : "gpb_mex.ilk" MANIFEST : "gpb_mex.mexa64.manifest" TEMPNAME : gpb_mex EXEDIR : EXENAME : gpb_mex OPTIM : -O2 -fwrapv -DNDEBUG LINKOPTIM : -O CMDLINE1_0 : /usr/bin/gcc63 -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2018b/extern/include" -I"/usr/local/MATLAB/R2018b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -O2 -fwrapv -DNDEBUG "/home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/bindings/gpb_mex.c" -o /tmp/mex_1363958469865432_171081/gpb_mex.o CMDLINE1_1 : /usr/bin/gcc63 -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2018b/extern/include" -I"/usr/local/MATLAB/R2018b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -O2 -fwrapv -DNDEBUG "/usr/local/MATLAB/R2018b/extern/version/c_mexapi_version.c" -o /tmp/mex_1363958469865432_171081/c_mexapi_version.o ------------------------------------------------------------------- Building with 'gcc'. /usr/bin/gcc63 -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2018b/extern/include" -I"/usr/local/MATLAB/R2018b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -O2 -fwrapv -DNDEBUG "/home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/bindings/gpb_mex.c" -o /tmp/mex_1363958469865432_171081/gpb_mex.o /usr/bin/gcc63 -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2018b/extern/include" -I"/usr/local/MATLAB/R2018b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -O2 -fwrapv -DNDEBUG "/usr/local/MATLAB/R2018b/extern/version/c_mexapi_version.c" -o /tmp/mex_1363958469865432_171081/c_mexapi_version.o /usr/bin/gcc63 -pthread -Wl,--no-undefined -Wl,-rpath-link,/usr/local/MATLAB/R2018b/bin/glnxa64 -shared -O -Wl,--version-script,"/usr/local/MATLAB/R2018b/extern/lib/glnxa64/c_exportsmexfileversion.map" /tmp/mex_1363958469865432_171081/gpb_mex.o /tmp/mex_1363958469865432_171081/c_mexapi_version.o -L</home/clusterbomb/Downloads/GPUGPB/damascene-python-and-matlab-bindings-master/build/libdamascene.so> -L"/usr/local/MATLAB/R2018b/bin/glnxa64" -lmx -lmex -lmat -lm -lstdc++ -o gpb_mex.mexa64 /tmp/mex_1363958922594243_171081: line 2: -L/usr/local/MATLAB/R2018b/bin/glnxa64: No such file or directory Error using mex The command '/usr/bin/gcc63' exited with a return value '1'I have double and triple checked that the directory /usr/local/MATLAB/R2018b/bin/glnxa64 exists (it does). I have also tried
restoredefaultpathandrehash toolboxcacheto no avail. No change when I utilize gcc 5.3.0 or the native RHEL 7 gcc. Thank you for your help so far! -
I can't use MEX function located in private folder
I have a problem calling a function from MEX-file located in a private folder.
I installed the Piotr's Matlab Toolbox (downloading and unzip)
I add this toolbox, including sub-directories, like this below:
addpath(genpath('piotr_toolbox'))I can see a MEx-file
prior_toolbox/toolbox/channels/private/imResampleMex.mexw64My own
test.mfile calls thisimResampleMexfunction like this:B = imResampleMex(A, scale(1), scale(2), 1);However, this produces the error message:
'imResampleMex' is not defined for 'uint8' inputs
I'll appreciate any answer.
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Cannot convert Matlab code to C code using Matlab Coder
I have a MATLAB code shown in below. I am trying to convert this code to C code using MATLAB Coder but I encountered an error.
Expected either a logical, char, int, fi, single, or double. Found an mxArray. MxArrays are returned from calls to the MATLAB interpreter and are not supported inside expressions. They may only be used on the right-hand side of assignments and as arguments to extrinsic functions.
% Applies A-weighted filtering to sound and draws it's plot % in a figure as output. function A_filtering coder.extrinsic('tic') coder.extrinsic('toc') coder.extrinsic('display') sampleRate = 44100; reader = dsp.AudioFileReader('Jet_Flypast.wav'); fs = 44100; weightFilter = weightingFilter('A-weighting',fs); % fileWriter = dsp.AudioFileWriter('SampleRate',fs); % visualize(weightFilter,'class 1') scope = dsp.SpectrumAnalyzer('SampleRate',fs,... 'PlotAsTwoSidedSpectrum',false,... 'FrequencyScale','Log',... 'FrequencyResolutionMethod','WindowLength',... 'WindowLength',sampleRate,... 'Title','A-weighted filtering',... 'ShowLegend',true,... 'ChannelNames',{'Original Signal','Filtered Signal'}); tic while toc < 60 x = reader(); y = weightFilter(x); scope([x(:,1),y(:,1)]) display(x(:,1)) end release(scope); release(weightFilter); release(reader); endThis question might be a duplicate but I searched internet and couldn't find any related posts. Is there any way to solve this error?