floating point quantization

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God'sSon
God'sSon 2011-3-25
hello, I am working on an audio compression project as my final year dissertation in which I need to implement floating point quantization. I am stuck at a stage where i need to count the number of leading zeros in my array. can anyone please help me with this algorithm.
1 0 0 0
0 0 1 1
0 1 1 0
0 1 0 1
0 0 0 1
0 1 1 0
0 0 1 1
1 0 0 0
what I want is a fifth column that has the numers of leadind zeros in each row. So from the array above, my fifth coulmn should be 0 2 1 3 1 2 0
cheers!

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Fangjun Jiang
Fangjun Jiang 2011-3-25
a=[1 0 0 0
0 0 1 1
0 1 1 0
0 1 0 1
0 0 0 1
0 1 1 0
0 0 1 1
1 0 0 0];
b=cumsum(a,2);
c=b==0;
d=sum(c,2)

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