Re: 0.0 is different with 0?

*To*: mathgroup at smc.vnet.net*Subject*: [mg90050] Re: 0.0 is different with 0?*From*: dh <dh at metrohm.ch>*Date*: Fri, 27 Jun 2008 06:17:35 -0400 (EDT)*References*: <g3vkss$kfs$1@smc.vnet.net>

Hi, consider: fs_Real. This matches an expression with head Real. 0 (zero) has head Integer. 0. has head Real. If you want to test both cases , you may e.g. use: _?NumericQ. hope this helps, Daniel damayi wrote: > Dear all > Here is an example to show my question. > SF[N_Integer, a_Real, fs_Real] := > Table[Sin[(1 + fs)*k*2 Pi/N + a], {k, 0, N - 1}] > > SF[32, 0.1, 0.0] can show the table contents, however, SF[32, 0.1, 0] > cannot show the result. Why? > > Best Regards > mayi > 2008-06-26 > -- Daniel Huber Metrohm Ltd. Oberdorfstr. 68 CH-9100 Herisau Tel. +41 71 353 8585, Fax +41 71 353 8907 E-Mail:<mailto:dh at metrohm.com> Internet:<http://www.metrohm.com>