The example below works but I would like to do something like
fvec=vector([tt*sin(tt),tt*cos(tt),sqrt(tt)])
in stead of
fvecx=tt*sin(tt)
fvecy=tt*cos(tt)
fvecz=sqrt(tt)
Is that possible? If yes, how?
Poul Riis
from math import *
from sympy import *
tt=Symbol('tt')
fvecx=tt*sin(tt)
fvecy=tt*cos(tt)
fvecz=sqrt(tt)
fvecxlambdified = lambdify(tt, fvecx)
fvecylambdified = lambdify(tt, fvecy)
fveczlambdified = lambdify(tt, fvecz)
fvecxdiff=fvecx.diff(tt)
fvecxdifflambdified=lambdify(tt,fvecxdiff)
fvecydiff=fvecy.diff(tt)
fvecydifflambdified=lambdify(tt,fvecydiff)
fveczdiff=fvecz.diff(tt)
fveczdifflambdified=lambdify(tt,fveczdiff)
print("fx(1)=",fvecxlambdified(1))
print("fy(1)=",fvecylambdified(1))
print("fz(1)=",fveczlambdified(1))
print("fx'(1)=",fvecxdifflambdified(1))
print("fy'(1)=",fvecydifflambdified(1))
print("fz'(1)=",fveczdifflambdified(1))
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