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/*******************************************************
* 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 <gtest/gtest.h>
#include <arrayfire.h>
#include <vector>
using namespace af;
using std::vector;
TEST(MatrixManipulation, SNIPPET_matrix_manipulation_tile)
{
//! [ex_matrix_manipulation_tile]
float h[] = {1, 2, 3, 4};
array small_arr = array(2, 2, h); // 2x2 matrix
af_print(small_arr);
array large_arr = tile(small_arr, 2, 3); // produces 4x6 matrix: (2*2)x(2*3)
af_print(large_arr);
//! [ex_matrix_manipulation_tile]
ASSERT_EQ(4, large_arr.dims(0));
ASSERT_EQ(6, large_arr.dims(1));
vector<float> h_large_arr(large_arr.elements());
large_arr.host(&h_large_arr.front());
unsigned fdim = large_arr.dims(0);
unsigned sdim = large_arr.dims(1);
for(unsigned i = 0; i < sdim; i++) {
for(unsigned j = 0; j < fdim; j++) {
ASSERT_FLOAT_EQ(h[(i%2) * 2 + (j%2)], h_large_arr[i * fdim + j] );
}
}
}
TEST(MatrixManipulation, SNIPPET_matrix_manipulation_join)
{
//! [ex_matrix_manipulation_join]
float hA[] = { 1, 2, 3, 4, 5, 6 };
float hB[] = { 10, 20, 30, 40, 50, 60, 70, 80, 90 };
array A = array(3, 2, hA);
array B = array(3, 3, hB);
af_print(join(1, A, B)); // 3x5 matrix
// array result = join(0, A, B); // fail: dimension mismatch
//! [ex_matrix_manipulation_join]
array out = join(1, A, B);
vector<float> h_out(out.elements());
out.host(&h_out.front());
af_print(out);
ASSERT_EQ(3, out.dims(0));
ASSERT_EQ(5, out.dims(1));
unsigned fdim = out.dims(0);
unsigned sdim = out.dims(1);
for(unsigned i = 0; i < sdim; i++) {
for(unsigned j = 0; j < fdim; j++) {
if( i < 2 ) {
ASSERT_FLOAT_EQ(hA[i * fdim + j], h_out[i * fdim + j]) << "At [" << i << ", " << j << "]";
}
else {
ASSERT_FLOAT_EQ(hB[(i - 2) * fdim + j], h_out[i * fdim + j]) << "At [" << i << ", " << j << "]";
}
}
}
}
TEST(MatrixManipulation, SNIPPET_matrix_manipulation_mesh)
{
//! [ex_matrix_manipulation_mesh]
float hx[] = {1, 2, 3, 4};
float hy[] = {5, 6};
array x = array(4, hx);
array y = array(2, hy);
af_print(tile(x, 1, 2));
af_print(tile(y.T(), 4, 1));
//! [ex_matrix_manipulation_mesh]
array outx = tile(x, 1, 2);
array outy = tile(y.T(), 4, 1);
ASSERT_EQ(4, outx.dims(0));
ASSERT_EQ(4, outy.dims(0));
ASSERT_EQ(2, outx.dims(1));
ASSERT_EQ(2, outy.dims(1));
vector<float> houtx(outx.elements());
outx.host(&houtx.front());
vector<float> houty(outy.elements());
outy.host(&houty.front());
for(unsigned i = 0; i < houtx.size(); i++) ASSERT_EQ(hx[i%4], houtx[i]) << "At [" << i << "]";
for(unsigned i = 0; i < houty.size(); i++) ASSERT_EQ(hy[i>3], houty[i]) << "At [" << i << "]";
}
TEST(MatrixManipulation, SNIPPET_matrix_manipulation_moddims)
{
//! [ex_matrix_manipulation_moddims]
int hA[] = {1, 2, 3, 4, 5, 6};
array A = array(3, 2, hA);
af_print(A); // 2x3 matrix
af_print(moddims(A, 2, 3)); // 2x3 matrix
af_print(moddims(A, 6, 1)); // 6x1 column vector
// moddims(A, 2, 2); // fail: wrong number of elements
// moddims(A, 8, 8); // fail: wrong number of elements
//! [ex_matrix_manipulation_moddims]
}
TEST(MatrixManipulation, SNIPPET_matrix_manipulation_transpose)
{
//! [ex_matrix_manipulation_transpose]
array x = randu(2, 2, f32);
af_print(x.T()); // transpose (real)
array c = randu(2, 2, c32);
af_print(c.T()); // transpose (complex)
af_print(c.H()); // Hermitian (conjugate) transpose
//! [ex_matrix_manipulation_transpose]
}
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