删除矩阵的第i行。 i在数据矩阵中从1到行数不等

I want to remove each row of a matrix, one by one. First I remove the first row, run my function, then I want to get back the first row but remove the 2nd row, and so on. It's just like when what we do in calculating Jackknife. I want to remove each row of a matrix, one by o