9.1.8 Rewriting with Heaviside function
The linstep command rewrites piecewise defined
expressions, as well as expressions involving step functions (signum and Heaviside)
and/or absolute values, as a linear combination of Heaviside functions of linear arguments
(see Section 7.3.2).
-
linstep takes one mandatory argument and one optional argument:
-
expr, an expression.
- Optionally, x, a variable (by default, x=x).
- linstep(expr ⟨,x ⟩) returns expr
written as a sum of terms in form f(x)θ(x−a), where
θ denotes Heaviside function.