How to apply logical matrix to the matrix with array operation?

I was wonder that once i create a mask from the image, is there any way that i can ask the matlab to generate the matrix of image based on the logical value from the mask. In orther words, if i have a mask that labels the ball, how can i apply the mask to the image to only shows the pixels of ball.

I am mainly looking for array operation since for loop that iterate through height and length is quit slow.

Lets take a look on a example in 2D matrix.

Matrix = [ 3 4;

5 6]

Logical= [ 1 1 ;

0 0]

I want to have a result:

R = [3 4;

0 0]

Thank you in advance!

Answer 1

[Matt J]

Matrix = [ 3  4;
           5   6];
Logical= [ 1 1 ;
           0  0];

R=Logical.*Matrix

R = 2×2

3 4 0 0