Re: using Save/Get with a function definition
- To: mathgroup at smc.vnet.net
- Subject: [mg81742] Re: using Save/Get with a function definition
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Tue, 2 Oct 2007 05:48:32 -0400 (EDT)
- Organization: The Open University, Milton Keynes, UK
- References: <fdqd17$n5p$1@smc.vnet.net>
congruentialuminaire at yahoo.com wrote: > I am trying to use" Get" with a function definition. I can guess I am > not saving it properly. Any help is greatly appreciated. Here is my > test: > > Expand[(x+y)^3] >> tmp1 > > f[x_] := Sin[x] > > % >> tmp1 > > (exit Mathematica) > > (bring up Mathematica) > > << tmp0 > > (shows expanded poly) > > << tmp1 > > (no output) > > ?f > > Information::notfound: Symbol f not found. >> The symbol << is a shortcut for the function *Put* that writes the result of the evaluation of an expression. A *SetDelayed* definition does not output anything (check the contents of the file tmp1: it contains the symbol NULL). To save a function definition and its dependences, use *Save*. For instance, (* First session *) In[1]:= Expand[(x + y)^3] >> tmp0 f[x_] := Sin[x] >> tmp1 Save["tmp2", f] (* Second session *) In[1]:= << tmp0 << tmp1 << tmp2 Out[1]= x^3 + 3 x^2 y + 3 x y^2 + y^3 In[4]:= ?f Global`f f[x_]:=Sin[x] In[5]:= f[2] Out[5]= Sin[2] Regards, -- Jean-Marc