cabbages                package:MASS                R Documentation

Data from a cabbage field trial

Description:

     The 'cabbages' data set has 60 observations and 4 variables

Usage:

     cabbages

Format:

     This data frame contains the following columns:

     'Cult' Factor giving the cultivar of the cabbage, two levels:
          'c39' and 'c52'.

     'Date' Factor specifying one of three planting dates: 'd16', 'd20'
          or 'd21'.

     'HeadWt' Weight of the cabbage head, presumably in kg.

     'VitC' Ascorbic acid content, in undefined units.

Source:

     Rawlings, J. O. (1988) _Applied Regression Analysis: A Research
     Tool._ Wadsworth and Brooks/Cole.  Example 8.4, page 219.
     (Rawlings cites the original source as the files of the late Dr
     Gertrude M Cox.)

References:

     Venables, W. N. and Ripley, B. D. (1999) _Modern Applied
     Statistics with S-PLUS._ Third Edition. Springer.

