Hello! I have an implicit equation that fixes y as a function of x. I plotted y over a range of x using the package ImplicitEquations.jl . I would now like to plot a third variable w over the same x range and using the y values consistent with the implicit equation. Is this possible? I thought of …

Do not know the answer. However, for your specific equation f(x,y) = 0, it seems at first sight that one could solve explicitly for x as a function of y? The equation is quite long and I might well be overlooking something. Sorry if that is the case.

If you want to plot (x,y,w(x,y)) along the curve defined by f(x,y) = c then ImplicitEquations isn’t quite the right tool, as it doesn’t really parameterize the curve so that w can be evaluated along it. However, the MDBM package can help (as could the Contour package). Here is how you might do this…

Thanks for your reply! I don’t think a closed-form solution exists in this case. I did work around this and get a numerical solution for y over an x grid, but I was interested in implicit function plots more in general!

Thanks a lot for your reply! This looks like what I need, I’ll try to implement it for my case.

Plotting implicit functions

General Usage

rafael.guerra February 9, 2021, 9:39am 6

@em55, could you please format your code as recommended on the PSA at top of Julia discourse pages, by enclosing it within backticks?
As is, it does not run for me.

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Plotting implicit functions

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