The function for determining the position of a given value in an array.

2011 11 11
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I have an array storing numerical values, I know the last part of this array are all zero values. How can I find the starting position of this part? In other words, I would like to find the starting position of 0 in this array. Which function should I use?

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Wayne King
Wayne King 2011-11-11

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x = ones(1e3,1);
x(750:end) = 0;
index = find(x == 0,1);
If you want to find the first K values.
K = 3;
indices = find(x==0,K,'first');
so
index = find(x == 0,1);
is equivalent to
index = find(x == 0,1,'first');

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