lin_algebra/svd.cpp

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lin_algebra/svd.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();
float h_buffer[] = {1, 4, 2, 5, 3, 6 }; // host array
array in(2, 3, h_buffer); // copy host data to device
array u;
array s_vec;
array vt;
svd(u, s_vec, vt, in);
array s_mat = diag(s_vec, 0, false);
array in_recon = matmul(u, s_mat, vt(seq(2), span));
af_print(in);
af_print(s_vec);
af_print(u);
af_print(s_mat);
af_print(vt);
af_print(in_recon);
} 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;
}