Re: Better Set or Set Delayed ?
- To: mathgroup at smc.vnet.net
- Subject: [mg45195] Re: Better Set or Set Delayed ?
- From: "Jean.Pellegri" <Jean.Pellegri at wanadoo.fr>
- Date: Sat, 20 Dec 2003 05:56:01 -0500 (EST)
- References: <brs4pd$ihn$1@smc.vnet.net> <bruqtq$t0v$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
"Paul Abbott" <paul at physics.uwa.edu.au> a écrit dans le message de news:bruqtq$t0v$1 at smc.vnet.net... > How about > > Laplacian[f_]:= Laplacian[f]= Function[{x,y}, > Evaluate[Derivative[2,0][f][x,y]+Derivative[0,2][f][x,y]]] > > This computes and stores the Laplacian of phi as a pure function. Then > you can compute values a particular points, such as > > Laplacian[phi][3,4] > > efficiently. Of genious Thanks and Ciao -- < Jean Pellegri > "fortitudo mea in rota" F - 93100 Montreuil I - 54023 Filattiera