Re: Functions with data hidden in them
- To: mathgroup at smc.vnet.net
- Subject: [mg81861] Re: Functions with data hidden in them
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 5 Oct 2007 04:49:42 -0400 (EDT)
- References: <fe28v5$muq$1@smc.vnet.net>
Hi, the old version used Format[], a bit newer is something like MakeBoxes[myfun[lst_, x_], fmt_: StandardForm] := RowBox[{"\[ScriptCapitalF]", "[", MakeBoxes[x, fmt], "]"}] and you will see that myfun[{1, 2, 3, 4}, x] will hide the first argument in output Regards Jens Neil Stewart wrote: > The Interpolation[] function somehow "hides" the data passed to it in the > InterpolationFunction object that it returns. In the example below, when > f[1] is evaluated it is using information from the list data, but does not > have the list data passed to it as parameter. > > In[1]:= data = {{1, 1}, {2, 2}, {3, 3}} > > In[2]:= f = Interpolation[data] > > In[3]:= f[1] > Out[3]= 1 > > How can I write my own function that stores data inside itself in the same > way that Interpolation does? I'm aiming to write a functions that takes a > number as a parameter and consults a large data set to return a number. I'm > not sure where to start - any ideas very welcome! > > Thanks, > Neil. > >