machine precision in plot
- To: mathgroup at smc.vnet.net
- Subject: [mg65745] machine precision in plot
- From: Joerg Schaber <schaber at molgen.mpg.de>
- Date: Sun, 16 Apr 2006 03:49:23 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
[This post has been delayed due to email problems - moderator]
Hi,
I have defined a function that takes as arguments small values and also
returns small values:
In[237]:=
P1[7.5`*^-17]
Out[237]=
-2.1926`*^7
However, when plotting the function with
Plot[P1[x], {x, 5.85`*^-17, 7.15`*^-17}]
I get an error message:
Plot::"plld" Endpoints for x in {x, 5.85`*^-17, 7.15`*^-17} must have
distinct machine-precision numerical values.
I thought Mathematica can handle such small numbers.
Any hint?
best,
joerg