# Replace jth zero in vector with j

2 views (last 30 days)
Scott on 27 Sep 2014
I would like to take a vector x as an input and (assuming that it has 0s), replace each 0 with the index of zero that it is. For example: >> x = [1 0 2 4 -3 0 3 0]; Would turn into: >>x_new = [1 1 2 4 -3 2 3 3]; Here is my code so far:
z = length(find(x==0)); count = 1;
for i=1:z
x(find(x==0))=count;
count = count + 1;
end;
This code just replaces all of the 0 elements with a 2. I want it to go through and count the zeroes off, and I am not sure at all where I am going wrong...
Any Thoughts?
Thanks!

Mohammad Abouali on 27 Sep 2014

Youssef Khmou on 27 Sep 2014
try :
x = [1 0 2 4 -3 0 3 0];
y=x;
[a,b]=find(x==0);
y(b)=b;
##### 2 CommentsShowHide 1 older comment
Geoff Hayes on 27 Sep 2014
Rather than assigning b as the result, just do the following
y(b) = 1:length(b);
as 1:length(b) will produce a vector with the same length as b with values in the order of 1,2,3,..

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