MATLAB: Where is the zero

vectors

How to find the location of a zero (or a different number) in a vector ?

like :

a=[ 1 3 5 6 34 4 0 1 3 4 50]
=>7

a=[ 1 3 5 6 34 4 0 1 3 4 50]
index=find(a==0)

a = [1 2 0 0 3 0 5];  %EDITED
b = [4 3 2];
a(a==0)=b

The simplest and most efficient solution is to use strfind:

>> a = [1,2,3,4];
>> A = [0,4,2,3,1,2,3,5,1,2,3,4,5,6];
>> strfind(char(A),char(a)) % or just strfind(A,a)
ans =  9