urine                  package:boot                  R Documentation

Urine Analysis Data

Description:

     The 'urine' data frame has 79 rows and 7 columns.

     79 urine specimens were analyzed in an effort to determine if
     certain physical characteristics of the urine might be related to
     the formation of calcium oxalate crystals.

Usage:

     data(urine)

Format:

     This data frame contains the following columns:

     'r' Indicator of the presence of calcium oxalate crystals.

     'gravity' The specific gravity of the urine.

     'ph' The pH reading of the urine.

     'osmo' The osmolarity of the urine. Osmolarity is proportional to
          the concentration of molecules in solution.

     'cond' The conductivity of the urine.  Conductivity is
          proportional to the  concentration of charged ions in
          solution.

     'urea' The urea concentration in millimoles per litre.

     'calc' The calcium concentration in millimoles per litre.

Source:

     The data were obtained from

     Andrews, D.F. and Herzberg, A.M. (1985)  _Data: A Collection of
     Problems from Many Fields for the Student and Research Worker_.
     Springer-Verlag.

References:

     Davison, A.C. and Hinkley, D.V. (1997)  _Bootstrap Methods and
     Their Application_. Cambridge University Press.

