Re: Dumb question
- To: mathgroup at smc.vnet.net
- Subject: [mg27781] Re: [mg27772] Dumb question
- From: Anesh Sooklal <anesh at fermi.udw.ac.za>
- Date: Sat, 17 Mar 2001 05:41:05 -0500 (EST)
- References: <200103140907.EAA00012@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Dear Gustavo,
You first have to define a function P. Your definition of P results not in a
function but rather an assignment. Special functions like Sin(x) are written as
Sin[x]. Note the use of square brackets in order to denote the argument of the
function. Don't use square brackets in order to enclose an expression. Use ( and
). Here is something that works....
P[x_, a_, t_] := (Sin[(a - x)*t]/(a - x))^2
Plot[P[x, 2, 1], {x, 0, Pi}]
The first statement defines a function. Note the use of underscores in order to
define the variables as well as the colon before the = sign.
In the second statement, a = 2 and t = 1. this results in P becoming simply a
function of x now.
I hope that I have been of some help.
Anesh Sooklal
Research Assistant
University of Durban-Westville
Dept. of Physics
South Africa
Gustavo Seabra wrote:
> Hello. I know this may be a dumb question, and I apologize for doing that.
> But I am new to Mathematica, and I'm having a little trouble with this. I
> want to plot the equation:
>
> P=[sin(a-x)*t/(a-x)]^2
>
> with fixed t (say, 1) and fixed a (say, Pi/2), with x varying from 0 to Pi.
> I know there is a discontinuity at x=a. Is there a way to plot this? I mean,
> P(x) versus x?
>
> Thanks,
> --
> -----------------------------------------------------------------
> Gustavo Seabra - Graduate Student
> Chemistry Department
> Kansas State University
> -----------------------------------------------------------------
- References:
- Dumb question
- From: Gustavo Seabra <gseabra@swbell.net>
- Dumb question