令Ifn=p, then this is a square matrix(方阵) A If a matrix has only one column, then this is called a column vector(列向量) o If there is only one row, then this is called a row vector r.(行向量) R=[2 2021/2/22 6 cxt2021/2/22 6 cxt ❖ If n = p , then this is a square matrix（方阵）. ❖ If a matrix has only one column, then this is called a column vector（列向量）. ❖ If there is only one row, then this is called a row vector.（行向量）