stattable.funs {Epi}

Special functions for use in stat.table

Description

These functions may be used as contents arguments to the function stat.table. They are defined internally in stat.table and have no independent existence.

Usage

count(id)
ratio(d,y,scale=1, na.rm=TRUE)
percent(...)

Arguments

id

numeric vector in which identical values identify the same individual.

d, y

numeric vectors of equal length (d for Deaths, y for person-Years)

scale

a scalar giving a value by which the ratio should be multiplied

na.rm

a logical value indicating whether NA values should be stripped before computation proceeds.

...

a list of variables taken from the index argument to stat.table

Value

When used as a contents argument to stat.table, these functions create the following tables:

count

If given without argument (count()) it returns a contingency table of counts. If given an id argument it returns a table of the number of different values of id in each cell, i.e. how many persons contribute in each cell.

ratio

returns a table of values scale * sum(d)/sum(y)

percent

returns a table of percentages of the classifying variables. Variables that are in the index argument to stat.table but not in the call to percent are used to define strata, within which the percentages add up to 100.

Author(s)

Martyn Plummer

See Also

stat.table