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Re: Best syntax for derivative

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96415] Re: Best syntax for derivative
  • From: Albert Retey <awnl at gmx-topmail.de>
  • Date: Fri, 13 Feb 2009 03:42:28 -0500 (EST)
  • References: <gn11tc$8e0$1@smc.vnet.net>

Hi,

> Suppose I have a function of three variables
> 
> f[x_, y_, z_]:=Sin[x y z]
> 
> And I want to construct g[x, y, z] which is the partial derivative of f
> [] with respect to y. I do
> 
> f[x_, y_, z_] := Sin[x y z]
> g[x_, y_, z_] := D[f[x, temp, z], temp] /. temp -> y
> 
> but I'm sure there is something better. Something along the lines of
> 
> g = Partial[f, 2]

Maybe this is what you are looking for:

h = Derivative[0, 1, 0][f]

hth,

albert


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