記調試MKL MATLAB接口

在將MKL C++代碼做MATLAB接口的過程中遇到一個小問題總是運行出錯，今天終於解決，記錄下來：

mxArray* aa = mxCreateSparse(num_of_feature, model->l, nonzero_element, mxREAL);
ptr = mxGetPr(aa);
jc = mxGetJc(aa);
ir = mxGetIr(aa);

代碼在64位機子上mex後運行會出錯，解決方法：

64-bit mex files using sparse matrices must be rebuilt with the "-largeArrayDims" option.  See the R2006b release

notes for more details.

> mex -largeArrayDims mkl-train.cpp