Making an array of coordinates from another array

I have a simple 1-d array with zeros and ones that looks something like:

array1=[1001011001]

Now I want to find the coordinates of where there is a '1' and insert those coordinates into an array.

I was thinking something along the lines of

for k=(1:10)

if array1(1,k)==1

k=x

end 

end

But it doesn't seem to be liking this.

Any ideas? Cheers in advance.

[Steve]

Use the find(array1) function with the conditions you need.

[Josh]

Cheers Steve. I had just found that as you answered. :)

[dpb]

And for nonzero elements in your example case the default condition is all that's needed.

idx=find(array1);

BTW, the problem in your loop solution is you're trying to use the array loop index as the target and there is no 'x'. It would look sotoo

j=0;
for i=1:length(array1)
  if array1(i)==1
    j=j+1;
    idx(j)=i
  end
end

This works but has a couple of issues the biggest of which is that the array idx isn't preallocated so that if it grows to be very large you'll see a large runtime penalty as the reallocations become more and more costly.