Create a composed function

In this example we are going to create a composed function

import openturns as ot

ot.Log.Show(ot.Log.NONE)

assume f, g functions

g = ot.SymbolicFunction(["x1", "x2"], ["x1 + x2", "3 * x1 * x2"])
f = ot.SymbolicFunction(["x1", "x2"], ["2 * x1 - x2"])

create the composed function

function = ot.ComposedFunction(f, g)

evaluate the function

x = [3.0, 4.0]
y = function(x)
print("x=", x, "y=", y)

x= [3.0, 4.0] y= [-22]