Question

我正在与Scilab合作，并且我正在使用mexFunctions，包括mex.h头文件。我想要的是在结构中创建一个结构。这是我的代码：

#include <mex.h>
void mexFunction(int nlhs, mxArray *plhs[], int nrhs,
                 const mxArray* prhs[])
{
#define  rows5_1 1
#define  cols5_1 1
#define  TOTAL_ELEMENTS5_1 (rows5_1 * cols5_1)

    int      ndim5_1 = 2, dims5_1[2] = {rows5_1, cols5_1};
    int      number_of_fields5=1;
    const char *field_names5_1[] = {"mylong","Nested","myarraydouble"};
    double    mylong[] = {987987};
    mxArray *Nested;
    double myarraydouble[] = {987,654,321};

    double    *pr5;
    mxArray  *field_value5, *struct_array_ptr5_1;
    struct_array_ptr5_1 = mxCreateStructMatrix(1, 1, 3, field_names5_1);
    int       index5;


    // Populate 1 mylong double
    for (index5=0; index5<1; index5++) {
        field_value5= mxCreateDoubleMatrix(1, 1, mxREAL);
        pr5 = mxGetPr(field_value5);
        pr5[0] = mylong[index5];

        mxSetField(struct_array_ptr5_1, index5, "mylong",field_value5);
        mxDestroyArray(field_value5);
    }

// Populate the array myarraydouble
    for (index5=0; index5<1; index5++) {
        field_value5= mxCreateDoubleMatrix(1, 3, mxREAL);
        pr5 = mxGetPr(field_value5);
        for(int i=0; i<3; i++) {
            pr5[i] = myarraydouble[i];
        }
        mxSetField(struct_array_ptr5_1, index5, "myarraydouble", field_value5);
        mxDestroyArray(field_value5);
    }
    if (nlhs)
        plhs[0] =struct_array_ptr5_1;
}

输出：

-->a=mex_5292()
a  =
mylong: 987987
Nested: [0x0 constant]
myarraydouble: [987,654,321]

我现在想要的是在＆＃34;嵌套＆＃34;中存储一个新结构。领域。我的代码是：

// Populate the struct

mxArray *s;
#define  rows5 1
#define  cols5 3
int dims5[3]= {rows5,cols5};
const char *field_names5_2[] = {"inval1","inval3","inval2"};
const char *inval2_names[]= {"hello"};
double    inval1_names[] = {12};
double    inval3_names[] = {34};
s = mxCreateStructMatrix(1, 1, 3, field_names5_2);

mxArray  *inval1,*inval2,*inval3;

//inval1
inval1= mxCreateDoubleMatrix(1, 1, mxREAL);
pr5 = mxGetPr(inval1);
pr5[0] = inval1_names[0];
mxSetField(s, 0, "inval1", inval1);

//Inval3
inval3= mxCreateDoubleMatrix(1, 1, mxREAL);
pr5 = mxGetPr(inval3);
pr5[0] = inval3_names[0];
mxSetField(s, 0, "inval3", inval3);

//Inval 2 //string
inval2 = mxCreateString(inval2_names[0]);
mxSetField(s, 0, "inval2", inval2);

mxDestroyArray(inval1);
mxDestroyArray(inval2);
mxDestroyArray(inval3);

输出:(我可以用（1），a（2），a（3））访问每个值

-->a=mex_5292()
a  =

inval1: 12
inval3: 34
inval2: "hello"

现在我试图在我的嵌套字段名称中添加这个1x1结构。

mxSetField(struct_array_ptr5_1, 0, "Nested", s);

但我总是有分段错误或类似的东西：

输出行：

-->a=mex_5292()
a  =

mylong: 987987
Nested: [1x1 struct]
myarraydouble: [987,654,321]

并且

-->a.Nested
ans  =

inval1: unknown
inval3: unknown
inval2: unknown

我无法访问价值观。如果有人可以帮助我。我认为问题来自mxSetField，也许它没有在struct中实现struct。

Answer 1

我对我的问题有一个答案：这是因为它没有在Scilab上实现，但相同的代码适用于MATLAB。

mexFunctions：结构中的结构

1 个答案: