Pure Function within a pure function
- To: mathgroup at smc.vnet.net
- Subject: [mg59269] Pure Function within a pure function
- From: ggroup at sarj.ca
- Date: Thu, 4 Aug 2005 02:07:53 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
I'm wondering if it is possible to define a pure function within a
function, and if so, what syntax should I be using?
I have some data that I want to filter, say:
rawdata[[1]]=
time1 pt1-1 pt1-2 pt1-3
time2 pt2-1 pt2-2 pt2-3
time3 aborted!
rawdata[[2]]=
time1 pta-1 pta-2 pta-3
time2 aborted!
I have a list of such data sets, and I want to apply a filter to remove
the "aborted" lines to each set. With a table command, this is fairly
easy:
data = Table[
Select[rawdata[[i]],Length[#]==4&],
{i,Length[rawdata]}
]
For readability (and lets face it, for pure asthetic value), I was
hoping to convert this to a function which I could map onto my rawdata
array. I tried something like:
data = Select[#, Length[#]==4&]& /@ rawdata;
But this doesn't work. I imagine the confusion is with the comparison
function Length[#]==4&, but I'm having no luck figuring out how to make
it less ambiguous.
Any pointers would be much appreciated.
Thanks!
PS: I'm using version 5.2 on Windows.