How to figure out which rows I delete and record them?

So I have the following code

function [Vnew, rows_removed] = removerows(V)
 x = isfinite(V);
 y = all(x,2);
 Vnew=V(y,:)
 rows_removed = V==Vnew
end

what this does is it takes the rows that have an NaN in them and deletes it. So for example, if my matrix

V =[ 1 9 0 8; 7 2 NaN 13; 4 2 10 0; 1 Inf 14 7 ]

then Vnew will be

Vnew = [ 1 9 0 8; 4 2 10 0; ];

I cannot however get the second part to work which would tell me which rows I deleted. SO for this example, it would be

rows_removed = [2, 4];

Any ideas? Thanks!

Answer 1

[KSSV]

You may follow something like below:

V =[ 1 9 0 8; 7 2 NaN 13; 4 2 10 0; 1 Inf 14 7 ] ;
Vnew = [ 1 9 0 8; 4 2 10 0; ];
% get row of NaN
[r1,c1] = find(isnan(V)) ;
%get inf
[r2,c2] = find(isinf(V)) ;
% remove those rows
V([r1 r2],:) = []