Return first few values to zero in a row

Hi I would like to change only the first few values in a row to zero?

For example I have matrix A=[1 2 4 5 6 7 8 9 0 2 3 4 5 6]

If I want to make the first column until ninth column to be zero, the the new matrix B will be: B=[0 0 0 0 0 0 0 0 0 2 3 4 5 6].

If I want to make the first column until fourth column to be zero, the the new matrix B will be: B=[0 0 0 0 6 7 8 9 0 2 3 4 5 6].

I was thinking something like: A(1,:)=zeros(1,4) but it won't change to zero.

Thank you!

Answer 1

[Voss]

A=[1 2 4 5 6 7 8 9 0 2 3 4 5 6]

A = 1×14

1 2 4 5 6 7 8 9 0 2 3 4 5 6

B1 = A;
B1(1:9) = 0

B1 = 1×14

0 0 0 0 0 0 0 0 0 2 3 4 5 6

B2 = A;
B2(1:4) = 0

B2 = 1×14

0 0 0 0 6 7 8 9 0 2 3 4 5 6

[Hokkien]

Thank you so much!

Answer 2

[Image Analyst]

@Hokkien you might want to review the short training to go over these basic indexing rules:

MATLAB Academy - Free 2 hour training