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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