How can I find the mixed partial derivatives using Matlab?

For example, to find d^3f/dxdy^2 of x^4*sin(xy)??

[Tamir Suliman]

https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=partial%2520differential%2520equations%2520with%2520matlab

Answer 1

[bio lim]

syms x y
f = (x^4)*sin(x*y);
der = diff(f,x,y,y)

der =

- 6*x^5*sin(x*y) - x^6*y*cos(x*y)

Answer 2

[John D'Errico]

You would differentiate with respect to y twice, so the second derivative, and once with respect to x. Essentially two calls to diff.

help syms
help diff

1st semester calc?