Add a integer at specific row

I have a double vector of zeros; lets call it A which will be like;

A=[0,0,0,0,0,0,0,0,0,0,0,...,0]

I want to make specific rows as one for example if B=[2,6,7] are the row index that I want as one the result would be someting like;

Anew=[0,1,0,0,0,1,1,0,0,0,...,0]

Answer 1

[madhan ravi]

Anew = A;
Anew(B) = 1

[sarina hosseini]

thank you it worked