Imagine that i have two arrays: a= [1 1 1 1 5 5 5 5 5 5 8 8; 1 1 1 3 5 5 5 5 5 8 8 8; 1 1 3 3 3 5 5 5 8 8 8 8; 1 3 3 3 3 3 5 8 8 8 8 8; 4 4 4 9 9 0 3 3 8 8 8 8; 4 4 4 9 0 0 3 3 3 3 8 8; 4 4 9 9 0 0 0 0 0 0 1 1; 4 9 9 9 0 0 0 0 0 0 1 1; 9 9 9 9 9 0 0 0 7 7 7 7] b = [4 5 7] I want ans like this : ans = 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 My "b" has more than 500 elements and my "a" is a satellite image.

How to find elements in an array based on a search from another array.

Denilson

2017 2 11

1 个回答

回答已采纳

5 次查看（30 天）

0 个投票

Imagine that i have two arrays:

 a= [1 1 1 1 5 5 5 5 5 5 8 8;
1 1 3 5 5 5 5 5 8 8 8;
1 3 3 3 5 5 5 8 8 8 8;
3 3 3 3 3 5 8 8 8 8 8;
4 4 9 9 0 3 3 8 8 8 8;
4 4 9 0 0 3 3 3 3 8 8;
4 9 9 0 0 0 0 0 0 1 1;
9 9 9 0 0 0 0 0 0 1 1;
9 9 9 9 0 0 0 7 7 7 7]
 b = [4 5 7]

I want ans like this :

 ans = 
0 0 0 1 1 1 1 1 1 0 0 
0 0 0 1 1 1 1 1 0 0 0 
0 0 0 0 1 1 1 0 0 0 0 
0 0 0 0 0 1 0 0 0 0 0 
1 1 0 0 0 0 0 0 0 0 0 
1 1 0 0 0 0 0 0 0 0 0 
1 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 1 1 1 1