lin_algebra/cholesky.cpp

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lin_algebra/cholesky.cpp
/*******************************************************
* Copyright (c) 2014, ArrayFire
* All rights reserved.
*
* This file is distributed under 3-clause BSD license.
* The complete license agreement can be obtained at:
* http://arrayfire.com/licenses/BSD-3-Clause
********************************************************/
#include <arrayfire.h>
#include <cstdio>
#include <cstdlib>
using namespace af;
int main(int argc, char *argv[])
{
try {
// Select a device and display arrayfire info
int device = argc > 1 ? atoi(argv[1]) : 0;
af::setDevice(device);
af::info();
int n = 5;
array t = randu(n, n);
array in = matmulNT(t, t) + identity(n, n) * n;
af_print(in);
printf("Running Cholesky InPlace\n");
array cin = in. copy();
af_print(cin);
printf("Running Cholesky Out of place\n");
array out_upper;
array out_lower;
cholesky(out_upper, in, true);
cholesky(out_lower, in, false);
af_print(out_upper);
af_print(out_lower);
} catch (af::exception& e) {
fprintf(stderr, "%s\n", e. what());
throw;
}
#ifdef WIN32 // pause in Windows
if (!(argc == 2 && argv[1][0] == '-')) {
printf("hit [enter]...");
fflush(stdout);
getchar();
}
#endif
return 0;
}