a=[1 2 3; 4 5 6]; fid = fopen(‘haha.txt‘, ‘w+‘);fprintf(fid,‘%8.4f %8.3f %d\n‘, a‘);fclose(fid);
type haha.txt
参考：https://wenku.baidu.com/view/f3cc1455ad02de80d4d84089.html
matlat保存矩阵数据
原文：https://www.cnblogs.com/yibeimingyue/p/10923286.html
