MATLAB: How to create a new variable after replacing some data from old variable

Question

% firstly,I have

A = [1 2 3 4 5; 6 7 8 9 10]

% then replace some value

A(A>3)=-999

%I would like to have

B= [1 2 3 -999 -999; -999 -999 -999 -999 -999] in the workspace.

%How to create independent B from edited A?

%Please advise

Answer 1

A = [1 2 3 4 5; 6 7 8 9 10]
B=A
B(A>3)=-999