Mystifying Scoping of Piecewise Variable?
- To: mathgroup at smc.vnet.net
- Subject: [mg116102] Mystifying Scoping of Piecewise Variable?
- From: Frank Iannarilli <frankeye at cox.net>
- Date: Wed, 2 Feb 2011 06:08:08 -0500 (EST)
- Reply-to: comp.soft-sys.math.mathematica at googlegroups.com
Perhaps I'm tired, but this is weird:
Clear[myFunc]
myFunc[y_] = Piecewise[{{x^2, x < 0}, {x, x >= 0}}]
(Same behavior below for either Set(=) or SetDelayed(:=) )
Plot[myFunc[y], {y, -10, 10}]
(returns empty plot)
Plot[myFunc[x], {x, -10, 10}]
(returns "expected" piecewise function plot)
What is the scoping of the Piecewise variable, in this case "x"?
How can one write a Module that creates and returns a Piecewise function? The scope of its argument is unclear to me.
Thanks