filtering rows by its second values in matlab

Question

I am new in Matlab I hope this question worth it. I have 2 sets of numbers. a=[0;0.01;0.02;0.03;...] (4187*1) b=[0;0.3;0.4;0.1;0.23;...] (4187*1) By defining f=[a b] (4187*2) Matrix I want to filter my rows by condition on b value (b>0.05) and I want to see the results in (a b) format. Can you help me on writing this program?

Answer 1

If you want to filter your rows depending on values in b then you can do this:

f = [a,b];
f = f((f(:,2)<=0.05),:);

This will keep all of the values less than or equal to 0.05 based on the values from b. This is assuming you want to delete all the rows of b>0.05

If you want to keep the values of b>0.05 then you would use this:

f = [a,b];
f = f((f(:,2)>0.05),:);