I Want to perform element wise matrix multiplication
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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
1 Comment
Stephen23
on 12 Jun 2017
"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:
Accepted Answer
KSSV
on 12 Jun 2017
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.
1 Comment
Walter Roberson
on 12 Jun 2017
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;
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