Implicit differentiation in Matlab 7.5.0 (R2007b) ?

Thread Starter


Joined Nov 26, 2006
I was trying to look up the command to help a friend with his homework for implicit differentiation. I couldn't find it in the help menu and the following code gave me:

>> clear
>> syms x y
>> H = y^2-x^3*(2-x);
>> idiff(H,x,y)
??? Undefined function or method 'idiff' for input arguments of type 'sym'.

Does anyone know the command to implicitly differentiate? Thanks.