c++ - 使用 -> 获取 gsl_matrix 结构指针

Question

我想要一个为 gsl_matrix 数据指针赋值的快捷方式，而不是写 gsl_matrix_set 16次，但我无法让它工作。一个独立的小样本：

#include <stdio.h>
#include <stdlib.h>
#include <gsl/gsl_linalg.h>
#include <gsl/gsl_matrix.h>

gsl_matrix* get_rates(double k) {

    int nChar = 4;
    gsl_matrix *rates = gsl_matrix_calloc(nChar, nChar);

//TODO: this apparently fails
    rates->data = (double[]) {-1, k/(k+2), 1/(k+2), 1/(k+2),
        k/(k+2), -1, 1/(k+2), 1/(k+2),
        1/(k+2), 1/(k+2), -1, k/(k+2),
        1/(k+2), 1/(k+2), k/(k+2), -1};

    return (rates);

}

int main(void) {

    gsl_matrix *rates;

    rates = get_rates(2.0);

    gsl_matrix_fprintf (stdout, rates, " %f");

        return(0);
}

返回：

score 1 · Accepted Answer

double data[16] = {
    -1, k/(k+2), 1/(k+2), 1/(k+2),
    k/(k+2), -1, 1/(k+2), 1/(k+2),
    1/(k+2), 1/(k+2), -1, k/(k+2),
    1/(k+2), 1/(k+2), k/(k+2), -1};

memcpy(rates->data, data, sizeof data);

参考：

c++ - 使用 -> 获取 gsl_matrix 结构指针

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