clearing specific data in matrix

Hi,

I have a question about clearing specific data in a matrix.

I have a matrix [1,14880] The data is between 1 and -20 I only need data that is above -5! Because below -5 are data errors.

How can i do this?

thanks in advance

Stijn

Answer 1

[Oleg Komarov]

Use logical indexing :

idx = A <= -5;
A(idx) = NaN;

where A is your matrix and NaN stands for Not a Number.

I advice you to read the getting started guide. In your case the second chapter is fundamental. More specifically the logical indexing part is http://www.mathworks.co.uk/help/techdoc/learn_matlab/f2-14896.html#f2-15124.