If I only need indicator functions (the function is 1 in an interval [a, b], 0 outside of it). Is there an alternative to piecewise functions (with all their issues like plotting), which I can use? Thank you!
EDIT: Ok, I had an idea:
indicator(x,a,b)=(sign(x-a)-sign(x-b))/2
That does pretty much what I want.
Here are two other options:
1) Use the Heaviside function:
f(x)=heaviside(x-1)-heaviside(x-3)
plot(f(x),(x,0,5))
2) define a Python function
def f(x,a,b):
if x>a and x<b:
return(1)
else:
return(0)
plot(lambda x: f(x,1,3),(x,-3,5))
Asked: 2015-04-21 15:47:42 +0100
Seen: 1,593 times
Last updated: Apr 21 '15
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