MATLAB: How to call out rows that contains a value X in column Z of matrix A

call outcolumnfunctionmatrixreturnrow

If I have a matrix A what command would return the number of each row in A that contains the value X in column Z?
EXAMPLE:
 A:
   20.0000    1.0000    8.3333
    2.0000    2.0000   32.6667
   45.0000    1.0000    5.3333
    4.0000    1.0000    8.3333
   54.0000    3.0000   25.0000
   38.0000    3.0000   33.3333
    7.0000    2.0000   16.6667
    8.0000    1.0000   10.3333
 somefunction(3,A(:,2)) = [5,6]
5 and 6 being the rows in A that contain the value 3 in column 2
Thank you!

Best Answer

find(A(:,Z)==X)
in general, and
find(A(:,2)==3)
for the specific case you mention.
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