RE: too many {{}}'s for listplot
- To: mathgroup at smc.vnet.net
- Subject: [mg38399] RE: [mg38334] too many {{}}'s for listplot
- From: David.Annetts at csiro.au
- Date: Fri, 13 Dec 2002 04:14:40 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hi Mario,
> i am trying to do a poincare map. i generate x[t] and x'[t]. i write
>
> z2 = Table[Evaluate[{x[t] , x'[t]} /. %], {t, 0, 10, .005}]
> ListPlot[z2]
>
> and i get a set of values that looks like
>
> {{0.517671, 9.75893}}, {{0.562696, 8.33465}}, {{0.601599,
> 7.26733}}, {{0.635675, 6.38612}},....
>
> the problem is when i use
>
> ListPlot[z2]
>
> i get the dreaded "is not a list of numbers" error. if i
> remove the extra
> parenthesis by hand it works, but thats a tedious business
> several hundred
> points. i am sure this is a simple thing to fix. i would
> appreciate any
> help.
You might try something like ListPlot[Partition[Flatten[z2], 2]]; And
there's probably another solution via FlattenAt[...]
Regards,
Dave.