Find entire rows in a matrix where a column value meets a certain condition

I have a matrix (4columns, ~50000 rows) and I want a new matrix that will only return the (entire) rows (values, not row number) where column 4 = 101300 (to 4s.f).

Any help appreciated.

VLE1(ii,:)=[x1 x2 T P]

Answer 1

[Guillaume]

filteredmatrix = originalmatrix(round(originalmatrix(:, 4), 4, 'significant') == 101300, :);

is all that is needed.

[David Carver]

thank you, thats exactly what I was looking for!

Answer 2

[Massimo Zanetti]

Assume your 50000x4 matrix is A, this will remove all the rows such having 4th element = 101300:

A(A(:,4)~=101300,:)=[];