Help Needed with looping commands

I have two sets of column data (about 120 data points each), d(:,1) and c(:,2).

How do I use the 'for' and 'if' loop commands to evaluate the difference between each of the points in the variables (that is, say E = d - c) and then compare each of the outcome with an error value computed already to produce another column data of results less than the error benchmark.

Thank you.

Answer 1

[KSSV]

Just use:

E = d(:,1)-c(:,2) ; 

You need not to use a loop.

[inteli]

1. How will I compare their differences with an error value and instruct it to output E and c values only of points less than the error value after the comparison.

[KSSV]

If A, B, C and D are arrays of same size.

E = A-B ;   % get difference 
idx = E<C ;  % compare difference of A, B with elements in C
iwant = D(idx) ;  % get elements in D by above comparison 

[inteli]

Thank you for the reply. Actually, I needed the program to output E and c values at any point/points of detection showing less than the error value.

[KSSV]

You can do what I have shown above right? Do the comparison, get the logical indices and pick the points.