Hello, I get a warning due to function-call syntax deprecation and I don't
understand how to fix it despite looking at other similar conversations.
Here is the setup for my code:
t=var('t')
gamma=vector([t,t^2,t^3])
curve=parametric_plot(gamma,(t,-2,2),color='black',radius=0.02)
v=derivative(gamma,t)
T=v/v.norm()
Tp=derivative(T,t)
N=Tp/Tp.norm()
B=T.cross_product(N)
This code creates the plot of a space curve and computes T,N,B which are
unit tangent, normal, and binormal vectors. Now I want to create an
interactive 3d plot:
def frame(x):
pT = T(x).plot(start=gamma(x),radius=0.02)
pN = N(x).plot(color='red',start=gamma(x),radius=0.02)
pB = B(x).plot(color='green',start=gamma(x),radius=0.02)
frenet = pT + pN + pB
whole = frenet + curve
return whole
a = animate([frame(x) for x in srange(-0.5,1.5,.02)])
a.show()
Although this works, I get the syntax deprecation warning at the line 'a =
animate(...'.
Any help is greatly appreciated!
Fred
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