MATLAB: Find with an indexed struc

Question

I have a struc M whose size is (88,1)

If for instance I type M(46,1).acc I get ans = 0

I typed find(M(:,1).acc==0) to find the rows where the acc field is zero, but got the error Error using == : Too many input arguments.

Any help? Thanks!!

Answer 1

Try

 find([M(:,1).acc]==0)