evaluating functions and displaying results numerically

*To*: mathgroup at smc.vnet.net*Subject*: [mg126159] evaluating functions and displaying results numerically*From*: Eduardo Fontana <prof.eduardofontana at gmail.com>*Date*: Sat, 21 Apr 2012 00:33:05 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

Once in a while a face a problem with Mathematica in which I cannot get a straightforward numerical output. I have a function defined in mathematica, I try to evaluate the function with numerical arguments and mathematica returns a replica of my function with the same arguments. It must be something I set without noticing. I cannot get numerical results at all. In another instance, I have a summation of about 1000 terms defined as a function of 3 arguments. When I use numerical arguments, instead of Mathematica calculating a numerical result it generates a symbolic output with all 1000 terms. Even if a try something very simple such as In[1]: Sin[1] the output is Out[1]: Sin[1] Could anyone give me a clue on this? regards

**Follow-Ups**:**Re: evaluating functions and displaying results numerically***From:*Murray Eisenberg <murray@math.umass.edu>

**Re: evaluating functions and displaying results***From:*Tomas Garza <tgarza10@msn.com>

**Re: evaluating functions and displaying results numerically***From:*Bob Hanlon <hanlonr357@gmail.com>