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[37] | 1 | /* Written by Tom Minka |
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| 2 | * (c) Microsoft Corporation. All rights reserved. |
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| 3 | */ |
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| 4 | #include "mex.h" |
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| 5 | #include "util.h" |
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| 6 | |
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| 7 | void mexFunction(int nlhs, mxArray *plhs[], |
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| 8 | int nrhs, const mxArray *prhs[]) |
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| 9 | { |
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| 10 | int ndims, len, i; |
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| 11 | int *dims; |
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| 12 | double *indata, *outdata; |
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| 13 | |
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| 14 | if((nlhs > 1) || (nrhs != 1)) |
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| 15 | mexErrMsgTxt("Usage: x = randgamma(a)"); |
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| 16 | |
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| 17 | /* prhs[0] is first argument. |
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| 18 | * mxGetPr returns double* (data, col-major) |
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| 19 | */ |
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| 20 | ndims = mxGetNumberOfDimensions(prhs[0]); |
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| 21 | dims = (int*)mxGetDimensions(prhs[0]); |
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| 22 | indata = mxGetPr(prhs[0]); |
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| 23 | len = mxGetNumberOfElements(prhs[0]); |
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| 24 | |
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| 25 | if(mxIsSparse(prhs[0])) |
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| 26 | mexErrMsgTxt("Cannot handle sparse matrices. Sorry."); |
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| 27 | |
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| 28 | /* plhs[0] is first output */ |
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| 29 | plhs[0] = mxCreateNumericArray(ndims, dims, mxDOUBLE_CLASS, mxREAL); |
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| 30 | outdata = mxGetPr(plhs[0]); |
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| 31 | |
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| 32 | for(i=0;i<len;i++) { |
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| 33 | *outdata++ = GammaRand(*indata++); |
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| 34 | } |
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| 35 | } |
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| 36 | |
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