sort_matrix function

Sort all columns of matrix x with respect to the j-th column.

This function can use the sort.list function in R. The reason for using it is that one wants the sort to carry along all columns.

sort_matrix(x, j)

Arguments

• x: An input matrix with several columns
• j: The column number with reference to which one wants to sort

Returns

A sorted matrix

Examples

set.seed(30)
x=matrix(sample(1:50),ncol=5)
y=sort_matrix(x,3);y