Re: and color via PlotStyle
- To: mathgroup at smc.vnet.net
- Subject: [mg118521] Re: and color via PlotStyle
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Sun, 1 May 2011 06:20:47 -0400 (EDT)
On 4/30/11 at 5:51 AM, siegman at stanford.edu (AES) wrote: >In article <ipe7mj$r1o$1 at smc.vnet.net>, >Bill Rowe <readnews at sbcglobal.net> wrote: >>>Plot[{ a x, a x^2, a x^3}/. {a -> 1},{x, 0, 2}, PlotStyle -> {Red, >>>Green, Blue}] >>>just produces blue plots. >>Exactly as it should. >The statement "Exactly as it _should_" is open to discussion here. Perhaps, I should have written "Exactly as it should according to the documentation". If "should" is taken to mean agreement with some user expectations, then yes, should is open to discussion/interpretation. And to extent that discussion cannot change Mathematica as it is, it is pointless to say Mathematica "should" be different than it is. As for your comments I snipped, yes, a basic understanding sufficient to get Plot to do something useful isn't adequate to explain why Plot[{ a x, a x^2, a x^3}/. {a -> 1}... produces a plot with a single color yet Plot[{x, x^2, x^3}}... produces a plot with three colors. But so what? Mathematica is a very powerful toolset containing many useful tools. And many of those tools have a variety of subtle settings that can be changed to achieve the desired result. To get best results from any set of tools, you have to take the time to fully understand the tools you are using. That takes time. And there is no other viable alternative. The behavior of Plot is well documented. And this particular behavior exists for good reasons.