MATLAB: Could you please tell me algorithm how to chose numbers in a matrix which is sastified a condition

Question

for example,i have a matrix a=|1 2 3;3 4 6;8 9 13| i want to chose value numbers between 2 and 5, so i get a12=2;a13=3;a21=3;a22=4;I also know the address of number. But with large matrix, how to get? thanh you so much

Answer 1

Luc, use

 a         = [1 2 3;3 4 6;8 9 13];
 [row col] = find(a>= 2 & a<=5);

which will give you the row and colum indices of the numbers you are looking for. To filter out the individual values and assign them to a new matrix, you could use

 aa = a(find(a>= 2 & a<=5));