esp_dsp matrix subtraction

dspm_matrix_main.cpp

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dsp_platform.h"
#include "esp_log.h"

#include "esp_dsp.h"

static const char *TAG = "main";

extern "C" void app_main();

void app_main()
{
    ESP_LOGI(TAG, "Start Example.");
    dspm::Mat A(3, 3);
    A(0, 0) = 10;
    A(0, 1) = 11;

    std::cout << "Matrix A" << std::endl;
    std::cout << A;
    std::cout << std::endl;
    std::cout << "A - I" << std::endl;
    std::cout << A - dspm::Mat::eye(3);
    std::cout << std::endl;

    float data[3] = {0, 0, 0};
    float data2[3] = {1, 1, 1};

    dsps_sub_f32(data, data2, data, 3, 1, 1, 1);

    std::cout << "{0, 0, 0} - {1, 1, 1}" << std::endl;
    std::cout << data[0] << " " << data[1] << " " << data[2] << std::endl;
}