- Function File:
`volat`=**vol***(*`x`,`m`,`n`) Return the volatility

`volat`of each column of the input matrix`x`.The number of data sets per period is given by

`m`(e.g. the number of data per year if you want to compute the volatility per year). The optional parameter`n`gives the number of past periods used for computation, if it is omitted, a value of 1 is used.If

`t`is the number of rows of`x`,`vol`

returns the volatility from`n*m`

to`t`.

Package: financial