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Welcome to the fun-expr wiki!

fun-expr contains a python module fun_expr to create sympy functions from a given expression, i.e.

$$ f(x) = a x^2 $$

(By the way: Does someone know, how to write latex code inside a github-wiki?)

Usually it is recommended to use expressions for this:

from sympy import *
init_printing()

a,x = symbols('a,x')
expr = a*x**2

# i.e.:
expr.subs(x,2) # returns 4*a

but i prefer to create a function:

from sympy import *
init_printing()

from fun_expr import Function_from_Expression as FE

a,x = symbols('a,x')

f = FE(x, a*x**2)

# i.e.:
f(2) # returns 4*a

I think, jupyter-notebooks and sympy are great tools to explore math interactively. But i think, if a student is just learning the concept of functions, it is confusing to write expressions like

expr.subs(x,2)

instead of

f(2)

More examples how to use Function_from_Expression can be found in the docs-section of this repo.