MATLAB: How many zeros do I have before a specific sting variable

Question

Dear all

I have

A={

    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    [0]
    ' b1'
    ' b1'
    ' b1'
    ' b1'
    ' b1'
    'b1'
    ' b1'
[0]
[0]
[0]
'b1'
    ' b1'}

I have this cell vector. This vector has a characteristic. Immediately after the first zeros the letter 'b1' begins. So I would like to count the zeros before the first 'b1' that starts to appear in this vector. In this case I have 39 zeros. Is it possible to calculate this number using a Matlab code?

thanks

Answer 1

yourzeros = find(cellfun(@ischar,A),1,'first')-1;