See my code:

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restart;

with(plots); with(PolynomialTools); with(LinearAlgebra);

f := (x, y) -> ((2*x^2+y^2*(x^2*(-2+sqrt(1/x^4+4/(x^2*y^2)+4/y^4+4))-1))/(4*x^2-2*y^2+4))^(1/2) ;

g := diff(f(x, y), x);

plot([g(.1, y), g(1, y), g(3, y)], t = 0 .. 10);

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Here is error message:

Warning, unable to evaluate the functions to numeric values in the region; see the plotting...

Hi guys,

I have a question.

I ploted two graphs using "spacecurve" function, respectively.

But, I want to plot two curves in one graphes.

(One the other hand, I want to compare two curves numerically).

thanks, and Have a good day!

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version : Maple 11

Major : Physics.

HI,

I wannt to ploting vector form, such as [a_i + b_j + c-_k =0].

This vetor is not matrix form but equation form with direction.

I also express magnitude of vector and direction of vector in plot.

For example, I define a vector, 3*i + 2*j + 1*k = 0, and I want to ploting in 3-Dim with direction.

Waiting everybody advise.

Thanks.

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Maple version : MAPLE11

Major : physics