How to perform partial differentiation of a 480x640 matrix?

I have a matrix with 480 rows and 640 columns. The matrix just contains numbers. How do I perform partial differentiation with respect to x and partial differentiation with respect to y on this matrix?

I am using Matlab 2015b.

Any help would be greatly appreciated

Answer 1

[Star Strider]

I would use the gradient function. It will do what you want. It assumes a constant ‘step’ in each direction, and you can specify that step for each direction.

[Gregor Lees]

ok doke, thanks. How would I change the function though from when i'm doing partial x to when i'm doing partial y?

[Guillaume]

Type

doc gradient

at matlab command prompt to see the documentation and see that it returns both partial differentials at once.