Re: Condition for pure functions

*To*: mathgroup at smc.vnet.net*Subject*: [mg60309] Re: Condition for pure functions*From*: Peter Pein <petsie at dordos.net>*Date*: Sat, 10 Sep 2005 22:36:30 -0400 (EDT)*References*: <de9dbs$qa3$1@smc.vnet.net> <dfue4l$1sb$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Misa schrieb: > Wonseok Shin wrote: > >>Hello everyone, >> >>Suppose that f[x] is defined as: >> >>f[x_ /; x > 0] := Sin[x]; >>f[x_ /; x <= 0] := Tan[x]; >> >>How can transform the above definition into a pure function? >> >>I know >> >>f = Which[# > 0, Sin[#], # <= 0, Tan[#]] & >> >>is a one solution. But is there any clever way to use Condition (/;) >>instead of Which[...] ? >> > > does anybody have some informations of Lobachevski. if yes then please > contact me > The articles in WikiPedia http://en.wikipedia.org/wiki/Special:Search?search=Lobachevski&go=Go are not enough? The 10^5 entries in google http://www.google.gr/search?&q=Lobachevsky should be sufficient.... -- Peter Pein, Berlin GnuPG Key ID: 0xA34C5A82 http://people.freenet.de/Peter_Berlin/