MATLAB: NaN selective removal from a matrix

nanremove nan rows

I have a matrix like this: a=[NaN NaN NaN NaN;NaN NaN NaN NaN;2 3 NaN 4;9 4 NaN 4;3 9 NaN 3];
and i want to remove all the rows that contains only NaN's to: b=[2 3 NaN 4;9 4 NaN 4;3 9 NaN 3];
please help me,
Ziv.

Best Answer

tf1 = isnan(a)
tf2 = all(a,2) 
tf3 = ~tf2
b = a(tf3,:)
b2 = a(~all(isnan(a),2),:) % in one giant leap
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