RE: machine size real numbers?
- To: mathgroup at smc.vnet.net
- Subject: [mg35810] RE: [mg35800] machine size real numbers?
- From: "Ingolf Dahl" <f9aid at fy.chalmers.se>
- Date: Fri, 2 Aug 2002 02:41:35 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
This works:
x[t_] := 1 + Cos[2000*Pi*t] + Sin[4000*Pi*t]
(with square brackets for function arguments)
followed by
Plot[x[t], {t, 0, 8000*Pi}]
(with the function argument specified).
The plot looks like white noise, but do not blame Mathematica for that! If
you change the options for Plot, you surely could produce a printout that
tests the blackness of your printer toner :)
Use
Plot[x[t], {t, 0, 0.002}]
instead. Then you will see 2 periods of your function.
Ingolf Dahl
Chalmers University
Sweden
-----Original Message-----
From: Rick Dyer [mailto:rkdyer at cecs.pdx.edu]
To: mathgroup at smc.vnet.net
Subject: [mg35810] [mg35800] machine size real numbers?
In[1]:=
x[t_] := 1 + Cos(2000*Pi*t) + Sin(4000*Pi*t)
In[2]:=
Plot[x, {t, 0, 8000*Pi}]
Plot::"plnr": x is not a machine-size real number at t =
0.0010471975511965976
Plot::"plnr": x is not a machine-size real number at t =
1019.5597016296903
Plot::"plnr": x is not a machine-size real number at t =
2131.4776207838036
General::"stop": Further output of Plot :: "plnr" will be suppressed
during this calculation
I am trying to plot the function x(t) defined above, same thing
happens when i try to plot other similar functions always get an error
saying that the machine size number is nor real, I have tried to find
an answer in this message group, as well as the mathematica help
online and built in, if someone knows what is going on please help me.
My computer is an AMD 1Gig with 256MG of ram, if that is of
consequence. Windows XP pro
Any help would be appreciated
Thanks Rick