Delete multiple elements from matrix, that match value at once

Hello everybody,

I wanted to know if there is a possibility do remove certain elements from a matrix at once, that match a specific value, without using the indexes?

You can do it with single values like this:

A(A==cerain_value)=[];

or

A(A<cerain_value)=[];

But what if there are multiple values I want to have removed?

Like :

A=[1,2,3,4,5;3,4,6,7,8;1,2,4,5,6;8,7,6,3,4;1,2,3,4,5];

and I want to remove every 1,3 and 5, without any loop or going with the indexes instead of the values.

How is this possible?

A(A==[1,2,5])=[];

does not work.

Many thanks in advance.

Best regards

Marc

Answer 1

[Stephen23]

The simple MATLAB solution is to use ismember to generate the indices:

>> A = [1,2,3,4,5;3,4,6,7,8;1,2,4,5,6;8,7,6,3,4;1,2,3,4,5];
>> A(ismember(A,[1,3,5])) = []
A =
   8
   2
   4
   2
   7
   2
   6
   4
   6
   4
   7
   4
   8
   6
   4

Answer 2

[Mehmed Saad]

A=[1,2,3,4,5;3,4,6,7,8;1,2,4,5,6;8,7,6,3,4;1,2,3,4,5];
R = [1 2 5];
L=arrayfun(@(x) A==x,R,'uni',0);
A(any(cat(3,L{:}),3)) = [];