Talk:Periodic function

From Wikipedia, the free encyclopedia

Contents 1 Period of a modified sine graph 2 Help wanted at oscillator 3 Overuse of f for function name 4 Naturally Occuring Functions

[edit] Period of a modified sine graph

How do you find the period of a modified sine graph?

What do you mean? The period is the smallest number a such that

f(x+a) = f(x) for all x

i.e. the point at which it starts to repeat itself

What does your modified sine graph look like?

In general, a sine function g(x) = a * sin(m * (x + p)) + d has period P such that m = (2 * Pi) / P. Note that the coefficient of x in (x + p) must be 1. --anon

[edit] Help wanted at oscillator

There is some content at oscillator that needs sorting out. Please read the proposal at Talk:oscillator Cutler 18:51, 18 Feb 2004 (UTC)

[edit] Overuse of f for function name

The function name f is re-used here, sometimes for an arbitrary function and sometimes for a specific one. Would it be clearer if the function that gives the "fractional part" of its argument were named something else? Frac is a reasonably common name for this operation in programming languages. --FOo 02:57, 9 Dec 2004 (UTC)

[edit] Naturally Occuring Functions

Should this secton contain some real-life periodic functions? i.e tides over a 48 hour perion Ac current etc? --anon