+---------+-------------------+
| farms   | R Documentation   |
+---------+-------------------+

Ecological Factors in Farm Management
-------------------------------------

Description
~~~~~~~~~~~

The ``farms`` data frame has 20 rows and 4 columns. The rows are farms
on the Dutch island of Terschelling and the columns are factors
describing the management of grassland.

Usage
~~~~~

::

    farms

Format
~~~~~~

This data frame contains the following columns:

``Mois``
    Five levels of soil moisture – level 3 does not occur at these 20
    farms.

``Manag``
    Grassland management type (``SF`` = standard, ``BF`` = biological,
    ``HF`` = hobby farming, ``NM`` = nature conservation).

``Use``
    Grassland use (``U1`` = hay production, ``U2`` = intermediate,
    ``U3`` = grazing).

``Manure``
    Manure usage – classes ``C0`` to ``C4``.

Source
~~~~~~

J.C. Gower and D.J. Hand (1996) *Biplots*. Chapman & Hall, Table 4.6.

Quoted as from:
 R.H.G. Jongman, C.J.F. ter Braak and O.F.R. van Tongeren (1987) *Data
Analysis in Community and Landscape Ecology.* PUDOC, Wageningen.

References
~~~~~~~~~~

Venables, W. N. and Ripley, B. D. (2002) *Modern Applied Statistics with
S.* Fourth edition. Springer.

Examples
~~~~~~~~

::

    farms.mca <- mca(farms, abbrev = TRUE)  # Use levels as names
    eqscplot(farms.mca$cs, type = "n")
    text(farms.mca$rs, cex = 0.7)
    text(farms.mca$cs, labels = dimnames(farms.mca$cs)[[1]], cex = 0.7)

