迭代地将矩阵插入/附加到矩阵中

Question

我想在最后添加一个3d矩阵到4D矩阵： 像这样：

v=VideoReading('video.avi');
mat3d = zeros([n m 3],'double');
mat4d = zeros([n m 3 2],'double');
for i=1:10
mat3d = read(v,i);
mat4d = ????;
end
l=size(mat4d);

我想在mat4d中添加10帧，l = [n m 3 12]

Answer 1

要获得这些帧的最具体的10个，你需要输入这样的命令：

#include <stdio.h>

    int main (void)
    {
        int i = 0, j = 0;
        int sbox [256];
        int key [32];

        char *key_str = "abcdefghijklmnopqrstuvwxyz";

        int tmp = 0;
        int n = 0;

        fprintf (stdout,"Key string is %s\n",key_str);
        for (i=0; i<32; i++)
        {
            key[i] = key_str[i%5];
            sbox[i] = i;
        }

        j = 0;
        for (i=0; i<32; i++)
        {
            j += sbox[i] + key[i];
            j = j % 32;
            tmp = sbox[i];
            sbox[i] = sbox[j];
            sbox[j] = tmp;
        }


        i = 0;
        j = 0;
        for (n=0; n<10000; n++)
        {

            i++;
            i = i % 32;
            j += sbox[i];
            j = j % 32;
            tmp = sbox[i];
            sbox[i] = sbox[j];
            sbox[j] = tmp;

            if ((n == 0) || (n == 99) || (n == 999) || (n == 9999))
            {
                fprintf (stdout,"byte %d is %0x00\n",
                        n+1,sbox[(sbox[i] + sbox[j]) % 32]);
            }
        }       
        return (0);
    }

Answer 2

我刚刚找到解决方案：

mat4d(:,:,:,i) = mat3d;

很简单！