stepfunction
nounUK /ˈstɛp ˌfʌŋkʃən/
US /ˈstɛp ˌfʌŋkʃən/
A step function is a math rule that stays flat for a while and then jumps to a new flat level.
The price of stamps is like a step function: it stays the same for years, then jumps up all at once.
RELATED WORDS
OTHER MEANINGS
2. A function whose graph looks like a series of flat steps rather than a smooth line.
The graph of a step function shows flat segments connected by sudden vertical jumps.
3. A mathematical function that changes value only at specific points and stays constant between them.
Shipping costs often follow a step function based on weight brackets.
4. In signal processing, a waveform that switches abruptly between fixed levels.
The digital signal was modeled as a step function switching between high and low.