Help System (web edition)

In addition to standard mathematical functions (like sqrt(),log(), etc.)
certain special functions are available on FILE MEDIT pages.

$MEAN(X)      arithmetic mean of variable X in non-missing observations.
$STDDEV(X)    standard deviation of X
$N(X)         number of of non-missing observations of X
$CORR(X,Y)    correlation coefficient between variables X and Y.
$MIN(X)       smallest value of X
$MAX(X)       greatest value of X
$ORDER()      order of current observation
$DAY()        current day of month (values 1,2,...,31)
$MONTH()      current month (values 1,2,...,12)
$YEAR()       current year (values 2005,2006,...)
$WDAY()       current weekday (1=Monday,...,7=Sunday)
$CLASS        See MEDITCL?

In the next |EXAMPLE| also usage of timestamps (MEDIT_TIME) is shown.

  M = More information on FILE MEDIT