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Re: why an extra mark in legend?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg106278] Re: why an extra mark in legend?
  • From: dh <dh at metrohm.com>
  • Date: Thu, 7 Jan 2010 02:30:02 -0500 (EST)
  • References: <hi1qb7$ejb$1@smc.vnet.net>


Hi Haibo,

NDSolve gives a list of lists of solutions. Therefore you have to dig 

out the first solution set (here the only one) by e.g.

NDSolve[...][[1]]

Daniel



Haibo Min wrote:

> Hello, everyone.

> 

> Suppose that I have attained a[t], b[t], c[t] in NDSolve.

> 





> s=NDSolve[...].

> 

> Then, I use

> 

> Plot[{a[t], b[t], c[t]} /. s // Evaluate, {t, 0, 20},  PlotRange -> {{0,

> 20}, {-2, 1}}, Frame -> True, Axes -> True,  FrameLabel -> {"Time(s)",

> "value"},

>  PlotStyle -> {{Red, Dashed, Thick}, {Blue, Thick}, {Black, Dotted, Thick}},

> PlotLegend -> {"a", "b", "c"},  LegendPosition -> {0.5, -0.3}, LegendSize ->

> {0.2, 0.3},

>  LegendShadow -> None]

> 

> to plot. It was supposed to have three marks in the legend, but I got four,

> where one of the marks had no text. Why?

> 

> Thanks.

> 

> Haibo

> 

> 




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