MATLAB: How to find non-zero values + lonely zeros in an array

cell arraysnon-zeros

Hey, I would like to find the non-zero cells plus the zeros that has no zeros before or after them. For example in the array [0 1 2 2 2 0 0 4 5 0 3 0 0 0 5] I'll get the indexes: 1,2,3,4,5,8,9,10,11,15.

Thanks!

Best Answer

v = [0 1 2 2 2 0 0 4 5 0 3 0 0 0 5];
union(strfind([false, v == 0, false], [0 1 0]), find(v))

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MATLAB: How to extract the first non-zero in several specific segments of the same matrix

ix1 = find(x(1:3,2),1,'first');  %index of first non-zero in x(1:3,2);
x1 = x(ix1,1);  %corresponding first-column value

ix2 = find(x(7:10,2),1,'first');  %index of first non-zero in x(7:10,2);
x2 = x(ix2,1);  %corresponding first-column value

MATLAB: Count Zeros Length Matrix Into an Array

>> m = [0 0 0 0 1 2 2 0 0 5 3 4 5 0 0 0 0 0 9 9 0 0 0];
>> x = find(diff([false,m==0,false]));
>> x(2:2:end)-x(1:2:end)
ans =
     4   2   5   3

Best Answer

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MATLAB: How to extract the first non-zero in several specific segments of the same matrix

MATLAB: Count Zeros Length Matrix Into an Array

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