Re: Partial derivation with regards to variables in a list
- To: mathgroup at smc.vnet.net
- Subject: [mg51071] Re: Partial derivation with regards to variables in a list
- From: p-valko at tamu.edu (Peter Valko)
- Date: Sun, 3 Oct 2004 05:47:53 -0400 (EDT)
- References: <cjgimt$q6i$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
I do not know if I understood the question correctly, but (who knows?) this might help: expr=f[a,b,c,d,e] Operator[Derivative[1,0,0,1,0],expr] You do not have to know the variables, but you do have to know how many of them are and which partial derivative you need. Peter Christopher grinde <christopher.grinde at hive.no> wrote in message news:<cjgimt$q6i$1 at smc.vnet.net>... > Hello. > > I need to find the partial derivative with regards to variables in a list. > > The straight forward syntax would be > D[f[a,b,c,d,e,],a,b,c,d,e] > > My problem is that I don't know the variables up front of finding the > derivative. > > I've tried Apply[], but as I am quite new to Mathematica, I haven't been > able to use Apply[] with functions with more than one argument. > > Please advice.