How can I pair elements in a row of a matrix, but sort the pairs by their second element?

In my program, I've called a function to give me a row vector with the number of columns that match the number of pairs of rows from a preestablished matrix. I have to arrange these values in ascending order in a table, but they must correspond to a certain name. For example, my function gives me spring constants, and I've created a matrix with the spring numbers in the first column and their corresponding spring constants in the second column. Sorting this matrix will reassign spring constants to different springs. If I have for example,

[3,k3;
 1,k1;
 2,k2;
 5,k5;
 4,k4]

(with kx being the spring constant). How can I make it so that I can arrange them in ascending order without changing the fact that one spring constant always corresponds to one spring?

Answer 1

[the cyclist]

Use the sortrows() command.