Re: Derivative of a function with multiple variables

*To*: mathgroup at smc.vnet.net*Subject*: [mg69498] Re: [mg69467] Derivative of a function with multiple variables*From*: "Chris Chiasson" <chris at chiasson.name>*Date*: Thu, 14 Sep 2006 06:55:50 -0400 (EDT)*References*: <200609130802.EAA18366@smc.vnet.net>

If you look in the help on D, it was extended to allow easy computation of the gradient and hessian. I think the syntax is: gradient D[f[x,y,z],{{x,y,z},1}] hessian D[f[x,y,z],{{x,y,z},2}] On 9/13/06, Adel Elsabbagh <aelsabbagh at gmail.com> wrote: > Hi all, > > I am sure this is easy to many of you > > Assume I have f = f[x,y,z] > I would like to construct a simple function g[f[x,y,z]] that will > generate the Hessian. i.e. > g[f[x,y,z]]= > {{Derivative[2,0,0][f][x,y,z], Derivative[1,1,0][f][x,y,z], > Derivative[1,0,1][f][x,y,z]}, > {Derivative[1,1,0][f][x,y,z], Derivative[0,2,0][f][x,y,z], > Derivative[0,1,1][f][x,y,z]}, > {Derivative[1,0,1][f][x,y,z], Derivative[0,1,1][f][x,y,z], > Derivative[0,0,2][f][x,y,z]}}. > > Any help? > > -- > Adel Elsabbagh > > -- http://chris.chiasson.name/

**References**:**Derivative of a function with multiple variables***From:*"Adel Elsabbagh" <aelsabbagh@gmail.com>