CODEWITHSUNDEEP
arraysmatlab
MR Meyqani
MR Meyqani

Reputation: 25

An array of zeros in a for loop in MATLAb

I've an array of zeros which is defined like this:

a=zeros(1,N)

Now,in a for loop,i need to have jth element of this array to be 1,and n-1 other elemnts to be zero,how should i do that? thanks.

Upvotes: 0

Views: 120

Answers (2)

user3187114
user3187114

Reputation: 21

The simplest would be to use a(1,j)=1 which will only change the jth element to 1. If you want to reassign 0 to other members of a, if it was changed before, you can then use a(1,1:j-1)=0 a(1,j+1:length(a)) to set all non jth terms of a to 0. If you provided us with clearer description of what you want to use a for, we may be able to help you better :)

Upvotes: 1

Luis Mendo
Luis Mendo

Reputation: 112679

One possibilty:

for jj = 1:N
    a = [zeros(1,jj-1) 1 zeros(1,N-jj)];
    %// do stuff
end

Another approach:

for a = eye(N)
    a = a.';
    %'// do stuff
end

Upvotes: 1

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