How to access a columns and two or more columns at constat interval and make a sperate matrix?

A=[1 2 3 4 5 6 7 8 9 11 12 12 14 15 16 17 18 19 20;1 2 3 4 5 6 7 8 9 11 12 12 14 15 16 17 18 19 20;1 2 3 4 5 6 7 8 9 11 12 12 14 15 16 17 18 19 20]

A = 3×19

1 2 3 4 5 6 7 8 9 11 12 12 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 11 12 12 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 11 12 12 14 15 16 17 18 19 20

I need 1st ,6th 11th columns as a matrix and a matrix excluding those columns?

Answer 1

[Matt J]

B=A(:,[1,6,11]);

C=A; 
C(:,[1,6,11])=[];