How to split a matrix by a column by whether values are greater or less than a number

I have a matrix:

I would like to split this into two new matrices which are dependent on whether the values in column C are greater than 7 or less than 7.

I have tried a loop:

for i=1:12
    if matrix(i,3)>7
        A=(matrix(i,:))
    elseif matrix(i,3)<7
        B=(matrix(i,:))
    end
end

this did not give me two matrices.

Can anyone help? Many thanks

Answer 1

[Ilham Hardy]

A = [5;3;6;1;7;8;2;3;4;8;6;5];
B = [45;25;36;87;45;14;2;31;59;6;47;2];
C = [4;5;8;6;11;14;9;5;1;19;3;10];
matt = [A,B,C];

matt1 = matt(find(matt(:,3)<7),:);
matt2 = matt(find(matt(:,3)>7),:);

Answer 2

[Azzi Abdelmalek]

A=randi(10,6,3)
idx=A(:,3)>7
A1=A(idx,:)
A2=A(~idx,:)