Re: How can I create a two-axis graph in Mathematica v6

*To*: mathgroup at smc.vnet.net*Subject*: [mg91776] Re: How can I create a two-axis graph in Mathematica v6*From*: "David Park" <djmpark at comcast.net>*Date*: Sun, 7 Sep 2008 05:40:40 -0400 (EDT)*References*: <g9t6of$ja8$1@smc.vnet.net>

With the Presentations package it is very easy to put any scales on any of the axes. The only requirement is that there must be a 1-1 mapping between the scale and the underlying plot coordinate. You can also completely control the tick values and format. Here is the example from the html link. (Putting the x^3 scale on the right is much better than the other way around.) Needs["Presentations`Master`"] f1[x_] := x^3; f2[x_] := Sqrt[x]; yrightticks = CustomTicks[#/35 &, {0, 70, 10, 5}, CTNumberFunction -> (Style[#, FontColor -> Red] &)]; yleftticks = CustomTicks[Identity, {0, 2, .5, 5}]; Draw2D[ {Red, Draw[f1[x]/35, {x, 0, 4}], Black, Draw[f2[x], {x, 0, 4}]}, Frame -> True, FrameLabel -> {{f2[x], f1[x]}, {x, None}}, RotateLabel -> False, FrameTicks -> {{yleftticks, yrightticks}, {Automatic, Automatic}}, PlotLabel -> "Plotting Two Functions with Different Scales", ImageSize -> 500] -- David Park djmpark at comcast.net http://home.comcast.net/~djmpark/ <avteran1 at gmail.com> wrote in message news:g9t6of$ja8$1 at smc.vnet.net... > Hello All, > > In my efforts to create a two-axis graph in Mathematica v6. I came > across a Mathematica Technical Support FAQ titled "Can I create a two- > axis graph in Mathematica?" There are two versions of this FAQ the > most recent and updated version of the FAQ can be found at the > following URL: > > http://support.wolfram.com/mathematica/graphics/combine/twoaxisgraph.en.html > > The URL site provides a Mathematica notebook titled "twoaxisgraph.en" > which may be downloaded. > > I have downloaded the "twoaxisgraph.en" notebook and have tried to use > it for my application but I continue to have problems with this code. > Without making any changes to the downloaded notebook and when > evaluating the part of the notebook that is for Mathematica 6.0 and > later, I do not get the same output plot as originally displayed in > the downloaded notebook. Specifically I am referring to the output > plots Out[4], Out[5], Out[7], and Out[8] that appear in the first part > of the web page. Instead, the output has "Null^4" preceding the plot > and the image size of the output plot is small and must be resized > manually to be able to be viewed. > > This is one problem with the part of the notebook dealing with > "Working with Continuous Plots" with "Mathematica 6.0 and Later." The > second problem is that it seems this code does not entirely do what I > need it to do. > > Ideally I would like to have something similar to the TwoAxisPlot > command that is used in the section "Working with Continuous Plots" > for "Mathematica Versions Prior to 6.0." That version allows you to > specify the common "x-range" to both plots and choose the "y-ranges" > for each individual plot to be plotted. This way you can see both > plots in their entirety regardless if one plots range is many times > larger than the others. Please refer to both the input and output > graphics of the last section of the web page, specifically In[2], > In[3], Out[2], and Out[3]. > > I need help with either making the code for "Working with Continuous > Plots" with "Mathematica 6.0 and Later" do what the code for "Working > with Continuous Plots" with "Mathematica Versions Prior to 6.0" does, > or change the code in "Working with Continuous Plots" with > "Mathematica Versions Prior to 6.0" so that it will work in > Mathematica v6. (Please refer to the URL) > > I am not very knowledgeable in Mathematica programming so any > assistance with this matter would be greatly appreciated. Any > suggestions or insight on how to change this notebook code to apply to > my needs would also help. As a reminder I am using Mathematica > v6.0.2.0. > > Thank you, > Tony >