Hi,
the following code works in SageCell if I remove the argument of the
anonymous function and uncomment line 3.
@interact
def _(f=('$f$',x^2)):
# f(x)=x^2
x0=1
def tangent(g,z):
return derivative(g,x)(z)*(x-z)+g(z)
pf=plot(f,-5,5)
t=tangent(g=f,z=x0)
pt=plot(t,-5,5)
show(pf+pt)
But in this form I get the deprecation warning
sagemathcell.py:8: DeprecationWarning: Substitution using function-call syntax
and unnamed arguments is deprecated and will be removed from a future release
of Sage; you can use named arguments instead, like EXPR(x=..., y=...)
See http://trac.sagemath.org/5930 for details.
t=tangent(g=f,z=x0)
None of my experiments after reading related posts helped.
Any hints?
Ingo
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