[Scilab-users] Element Wise multipliication in Scilab

[nigamakashkumar]

During Image Processing, I have an extracted small matrix 

Mat = 

  152  149  151  
  159  151  147  
  158  152  152  

and a simple flipped sobel mask 

 Gy  =
 
  - 1.  - 2.  - 1.  
    0.    0.    0.  
    1.    2.    1.  

To calculate the gradient in y-direction, I multiply elementwise (and would
sum later if the values were right)

Gy.*Mat, which funnily gives

 104  214  105  
    0    0    0  
  158   48  152  

Why aren't the first row values negative (They even appear morphed somehow).
Scilab help shows that .* may calculate the kronecker product of the two
matrices. How do I calculate the real element wise multiplication?

Kindly help. 








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