CODEWITHSUNDEEP
plotmaple
Ilyas y.
Ilyas y.

Reputation: 167

plot solution of fsolve() of parametric function

I have a function f(v,u) and I defined function

solutionf(u) := fsolve(f(v,u)=v);

I need to plot solutionf(u) depending on u but just

plot(solutionf(u), u = 0 .. 0.4e-1)

gives me an error 

Error, (in fsolve) number of equations, 1, does not match number of variables, 2

However I can always take the value solutionf(x) at any x.

Is there simple way to plot this? Or I have to make own for loop over u, take value at every point and plot interploating values?

Upvotes: 1

Views: 829

Answers (1)

Carl Love
Carl Love

Reputation: 1471

This is one of the most-often-asked Maple questions. Your error is caused by what is known as premature evaluation, the expression solutionf(u) being evaluated before u has been given a numeric value.

There are several ways to avoid premature evaluation. The simplest is probably to use forward single quotes:

plot('solutionf(u)', u= 0..0.4e-1);

Upvotes: 3

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