MATLAB: Eliminating value out of range

range filtering

I have two matrix.

A = rand(8,10);
B = rand(8,41);

range = 0.5345 (y+ direction and y- direction, range of elements of A);

i want to take all elements of B which fall in the range of matrix A 's elements. The elements of B which does not fall in the range should be NaN.

Declare a logical variable that states when values are in range

inRange = B >= min(A(:)) & B <= max(A(:));

Now assign to nan if outside that range, as you asked:

B(~inRange) = nan;

Or you can extract only those that are in range into a new variable:

BInRange = B(inRange);

Or you can delete those that are not in range, giving a shorter B than the original:

B(~inRange) = [];

x=[0.1:0.1:2];
range=[3:10];
x(range)

Deleting elements of an array while you iterate over elements of an array is never going to work.

In any case, a loop is not needed for what you're doing:

a=[1 2 3 4 5 6 7 8 nan nan nan nan nan];
b = a + 1
b(b < 4 | b > 6) = [];