C++ (Cpp) array::elements Examples

Example #1

File: knn.cpp Project: EmergentOrder/arrayfire

// Get accuracy of the predicted results
float accuracy(const array& predicted, const array& target)
{
    return 100 * count<float>(predicted == target) / target.elements();
}

Example #2

File: logistic_regression.cpp Project: rotorliu/arrayfire

float abserr(const array& predicted, const array& target)
{
    return 100 * sum<float>(abs(predicted - target)) / predicted.elements();
}

Example #3

File: gray_rgb.cpp Project: AshwinRajendraprasad/arrayfire

#include <arrayfire.h>
#include <af/dim4.hpp>
#include <string>
#include <vector>
#include <testHelpers.hpp>

using std::vector;
using af::array;
using af::randu;

TEST(rgb_gray, 32bit)
{
    array rgb = randu(10, 10, 3);
    array gray = rgb2gray(rgb);

    vector<float> h_rgb(rgb.elements());
    vector<float> h_gray(gray.elements());

    rgb.host(&h_rgb[0]);
    gray.host(&h_gray[0]);

    int num = gray.elements();
    int roff = 0;
    int goff = num;
    int boff = 2 * num;

    const float rPercent=0.2126f;
    const float gPercent=0.7152f;
    const float bPercent=0.0722f;

    for (int i = 0; i < num; i++) {