64bits and memory problem
in [Matlab]
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From: James on 11 Jan 2010 08:15 "Shiguo " <jiangshiguo(a)gmail.com> wrote in message <he4f39$c64$1(a)fred.mathworks.com>... > When I was using svmtrain in libsvm. I got this same problem. I write the software author (Chih-Jen Lin), he said that we need to modify make.m, add -largeArrayDims on 64-bit machines. So we need: > > mex -O -largeArrayDims ... > > now the make file is like this: > > mex -O -largeArrayDims -c svm.cpp > mex -O -largeArrayDims -c svm_model_matlab.c > mex -O -largeArrayDims svmtrain.c svm.obj svm_model_matlab.obj > mex -O -largeArrayDims svmpredict.c svm.obj svm_model_matlab.obj > mex -O -largeArrayDims libsvmread.c > mex -O -largeArrayDims libsvmwrite.c > > It fixed the problem. Enjoy~ > > P.S., the following FAQ says about the x64 compiler when installing visual studio c. > > Q: On 64bit Windows I compile the MATLAB interface without problem, but why errors occur while running it? > > If you use Microsoft Visual Studio, probabally it is not properly installed. See the explanation here. > http://www.mathworks.com/support/compilers/R2009b/win64.html;jsessionid=Ls87LF1JH1RnLp18kQdqtzvQGvw29Q4w26dJJn9JpzwZxCGNN7T4!-1681277526#n7 I was originally getting this error: "Function "mxGetIr_700" is obsolete in file "compat32.cpp", line 246. (64-bit mex files using sparse matrices must be rebuilt with the "-largeArrayDims" option. ...)" But I've still got this problem, even when I compile my GibbsSamplerAT.cpp file with the -largeArrayDims flag. GibbsSamplerAT.cpp: In function ‘void mexFunction(int, mxArray**, int, const mxArray**)’: GibbsSamplerAT.cpp:265: error: cannot convert ‘mwIndex*’ to ‘int*’ in assignment GibbsSamplerAT.cpp:266: error: cannot convert ‘mwIndex*’ to ‘int*’ in assignment GibbsSamplerAT.cpp:385: error: cannot convert ‘mwIndex*’ to ‘int*’ in assignment GibbsSamplerAT.cpp:386: error: cannot convert ‘mwIndex*’ to ‘int*’ in assignment GibbsSamplerAT.cpp:417: error: cannot convert ‘mwIndex*’ to ‘int*’ in assignment GibbsSamplerAT.cpp:418: error: cannot convert ‘mwIndex*’ to ‘int*’ in assignment Here are lines 265 and 266: irad = mxGetIr(prhs[2]); jcad = mxGetJc(prhs[2]); , where 'irad' and 'jcad' are defined as *int. I tried casting them to mwIndex*, but got further errors. Someone at this link http://www.stanford.edu/~dgleich/programs/matlab_bgl/faq.html said to "update to Matlab BGL 2.1 which includes precompiled files for 64-bit linux with support for largeArrayDims included". I have no idea how to do this. I downloaded the BGL, but I have no idea how to install it. I'm totally stumped. Any help much appreciated.
From: James on 20 Jan 2010 01:15 Hi guys, Thanks for the replies. I managed to solve this problem by simply converting all problematic mwIndex* arrays to int* arrays. Took me about a day, but at least it works now.
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