what to use for capital pi when using coordinated from an image

trying to code captial pi (x cos(theta) + y sin(theta). where x and y are cordinates from image.

I have been trying to use the function symprods

PSF = symprod((x*a)+(y*b))

but this seems to just run infinatly and i'm not sure what is wrong with it.

Answer 1

[Ganesh Regoti]

Prod function reflects the functionality of capital Pi. You can refer the following link

https://www.mathworks.com/help/matlab/ref/prod.html