1.Previous
3.Next

..., ''x''_''n'') = (''x''₁^-1+''x''₂^-1+ ··· + ''x''_''n''^-1)^-1) (where the list elements are positive numbers) provides the harmonic mean.

Moving average

Given a time series, such as daily stock market prices or yearly temperatures, people often want to create a smoother series. This helps to show underlying trends or perhaps periodic behavior. An easy way to do this is the moving average: one chooses

1.Previous
3.Next