A formula. The left-hand side specifies the variable over
which the mean will be taken. The right-hand side gives the grouping variables,
separated by <code>&amp;</code>.

formula

A data frame to which the formula variables refer. If not specified, variables
will be taken from the current environment.

data

The function used to calculate the means. Default: <code>mean</code>.

Logical flag indicating whether to drop unoccupied groups. Default <code>TRUE</code>.
NOT YET IMPLEMENTED.

drop

Additional arguments to be passed to the <code>fun</code> doing the calculation.

&#8230;

The function has been removed from mosaic.

Data sets and utilities from Project MOSAIC (<http://mosaic-web.org>) used
to teach mathematics, statistics, computation and modeling. Funded by the
NSF, Project MOSAIC is a community of educators working to tie together
aspects of quantitative work that students in science, technology,
engineering and mathematics will need in their professional lives, but
which are usually taught in isolation, if at all.

mm: Defunct modeling function

Description

Usage

Arguments