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Student Support Forum: 'plotting implicit function' topicStudent Support Forum > General > "plotting implicit function"

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Mike O'Connor
10/15/99 11:08pm

I'd like to plot current vs gain for the
following equation, in which X takes on the discrete values {0, 3, 6, 9, 12}. (Please note that it's not possible
to express the current in an explicit form.)

gain[current_, X_] = -Log[1/current -1] + X(2 current -1);
transferFunctionList = Table [gain[current,X], {X,0,12,3}];
Plot[Evaluate[transferFunctionList], {current,0,1},
PlotRange->{-8,8}]

The resulting graph is sorta kinda what I want, except that
I want the gain axis to be the independent(x) axis and the
current axis to be the dependent(y) axis.

Is there any way to accomplish this without resorting to
a power series expansion of the logarithm? I have tried
(possibly with incorrect syntax) the ImplicitPlot function
in the Graphics addon, but it chokes.

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Subject (listing for 'plotting implicit function')
Author Date Posted
plotting implicit function Mike O'Connor 10/15/99 11:08pm
Re: plotting implicit function Fabrice P. L... 11/13/99 07:14am
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