Re: Select any
- To: mathgroup at smc.vnet.net
- Subject: [mg101955] Re: Select any
- From: Peter Pein <petsie at dordos.net>
- Date: Fri, 24 Jul 2009 06:12:39 -0400 (EDT)
- References: <h4955q$q9l$1@smc.vnet.net>
Do you think of sth. like
get the even numbers:
In[1]:= Select[Range[20], EvenQ]
Out[1]= {2, 4, 6, 8, 10, 12, 14, 16, 18, 20}
or get the numbers with three prime factors (not necessarily
different
(http://www.research.att.com/~njas/sequences/A014612))
In[2]:= Select[Range[100], Plus @@ FactorInteger[#][[All, 2]] == 3 &]
Out[2]= {8, 12, 18, 20, 27, 28, 30, 42, 44, 45, 50, 52, 63, 66, 68, \
70, 75, 76, 78, 92, 98, 99}
Study the help-topic for "Select"!
Cheers,
Peter
Niko schrieb:
> does mathematica have something like "select any" that gets any
> element of a list that satisfies a criterion?
>