如何在矩阵后面追加数据,或者怎么合并2个矩阵,如将qqq = 1 2 2 2 3 3 4 5 www = 1 2 2 2 3 3 4 5 合并成ans= 1 2 2 2 3 3 4 5 1 2 2 2 3 3 4 5>> vercat(qqq,www) ??? Undefined command/function 'vercat'.