filter data in matrix

I have a matrix with 500 rows and two columns, I want to filter the first column when the value < 100 it shoud be removed. so, the new matrix will have the filtered data for the 2 columns.

C is the matrix

filt = C(:,1)<100;

C(filt) = [];

this will remove the data but will only return the first coumn . I want to have the second one also corsponding to that filter.

Answer 1

[KSSV]

Let A be your matrix of size m*2.

idx = A(:,1)<100 ;  % get logical indices in first column less than 100 
A(idx,:) = [] ;  % remove those rows 

You have to use :, which is read as all the.

[MOH]

thank you