I Want to perform element wise matrix multiplication

I have used the following code but getting an error message

I1=imread('abc.gif');
a=I1(1:3,1:3);
b=[-3 4 5;6 -7 1;-2 -4 -6];
c=a.*b;

The error message obtained is listed below Error using .* Integers can only be combined with integers of the same class, or scalar doubles.

How to clear this error

[Stephen23]

"I Want to perform element wise matrix multiplication"

This is a contradiction in terms: in MATLAB it is possible to perform element-wise multiplication OR matrix multiplication, but not both at the same time:

https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

Answer 1

[KSSV]

I1=imread('abc.gif');
a=I1(1:3,1:3);
b=uint8([-3 4 5;6 -7 1;-2 -4 -6]);
c=a.*b;

You see you can multiply only same classes. Class of a is uint8, so you need to convert b into the same class.

[Walter Roberson]

You would probably be better off with

a = double( I1(1:3,1:3) );
b = [-3 4 5;6 -7 1;-2 -4 -6];
c = a.*b;

Answer 2

[Muhammed Musa]

A = [1 2 3 4];

B = [9 8 7 6];

A.*B =