How can i take specific values from a matrix and put them into another matrix?

I have a 2170x2 matrix: the first column is filled with my values and the second one goes from 1 to 12 over and over again (1 to 12 representing each month of the year).

I need to regroup the values corresponding to each month together ( all the values from the first column that have the same number in the second column) but I can't figure it out.

Answer 1

[Matt J]

Let's say your matrix is A,

Matrices=splitapply(@(z){z},A,A(:,2))

Answer 2

[Matt J]

sortrows(yourMatrix,2)

[Samy Ben Thabet]

That worked to separate everything but they are all still in one matrix. Is there a way to separate them all into different ones? (all the ones in one matrix, the twos in another matrix...)