Re: Best syntax for derivative

*To*: mathgroup at smc.vnet.net*Subject*: [mg96416] Re: [mg96386] Best syntax for derivative*From*: Aaron Fude <aaronfude at gmail.com>*Date*: Fri, 13 Feb 2009 03:42:39 -0500 (EST)*References*: <200902121141.GAA08658@smc.vnet.net> <49943ED6.6070407@wolfram.com>

Thanks. That's cool. May I ask a follow up question? What if I want to have g=f^2? Is there a similar alternative to g[x_, y_, z_] := f[x, y, z]^2? Thanks again! On Thu, Feb 12, 2009 at 10:23 AM, Carl Woll <carlw at wolfram.com> wrote: > Aaron Fude wrote: > > 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] >> >> Many thanks in advance. >> >> Aaron >> >> >> > It's: > > g = Derivative[0, 1, 0][f] > > Carl Woll > Wolfram Research >

**References**:**Best syntax for derivative***From:*Aaron Fude <aaronfude@gmail.com>