19.1.1 Boxcar function
The boxcar
command creates a function which has the value 1
in a given interval, and otherwise 0.
-
boxcar takes three arguments:
-
a,b, two real numbers.
- x, an identifier or expression.
- boxcar(a,b,x) returns
θ(x−a)−θ(x−b), where
θ is the Heaviside function (see
Section 6.3.9). The resulting expression defines a
function which is zero everywhere except within the segment [a,b],
where its value is equal to 1.
Examples