Re: framed plots with two y axes scales

• To: mathgroup at smc.vnet.net
• Subject: [mg79954] Re: framed plots with two y axes scales
• From: "Chris Chiasson" <chris at chiasson.name>
• Date: Thu, 9 Aug 2007 05:27:50 -0400 (EDT)
• References: <acbec1a40708082003m7cd87835y13c699611eb2bd79@mail.gmail.com>

```Actually, I suspect a subtle error in Mathematica's code instead of
mine, since I think the following plots should have identical tick
sizes:

Plot[t,{t,0,2},Frame->True]
Show[%,AbsoluteOptions[%,FrameTicks]]

On 8/8/07, Chris Chiasson <chris at chiasson.name> wrote:
> In the old version of Mathematica, I used David Park's Draw Graphics
> package to obtain graphs with two y axes scales. I was successful in
> making these graphs without the package in the new version, but my
> technique involves a lot of code. Is there a cleaner way, such as
> being able to specify a scaling factor between both sides?
>
> Simple example:
> Height of a ball thrown straight up in a gravitational field with some
> initial velocity and no drag:
>
> plotExpr=h@t/.DSolve[m h''@t==-m g&&h'@0==v0&&h@0==0,h,t]/.{g->9.80665,v0->10}
> labelRightAxisTicks=Function[gr,With[{frameTicks=FrameTicks/.AbsoluteOptions[gr,FrameTicks],cf=3.2808},Show[gr,FrameTicks->Append[Drop[frameTicks,-1],{#1,If[#2=!="",SetPrecision[#1
> cf,3],""],##3}&@@@frameTicks[[2]]]]]]
> Plot[Evaluate@plotExpr,{t,0,2},Frame->True,FrameLabel->{"t (s)","h
> (m)",None,"h (ft)"}]
> labelRightAxisTicks@%
>
> Also, I suspect a subtle error in my code because the tick marks are
> not the size they should be (relative to the plot area).
>
>
> --
> http://chris.chiasson.name/
>

--
http://chris.chiasson.name/

```

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