Wheat2                 package:nlme                 R Documentation

Wheat Yield Trials

Description:

     The 'Wheat2' data frame has 224 rows and 5 columns.

Format:

     This data frame contains the following columns:

     Block an ordered factor with levels '4' < '2' < '3' < '1'

     variety a factor with levels 'ARAPAHOE'  'BRULE'  'BUCKSKIN' 
          'CENTURA'  'CENTURK78'  'CHEYENNE'  'CODY'  'COLT'  'GAGE' 
          'HOMESTEAD'  'KS831374'  'LANCER'  'LANCOTA'  'NE83404' 
          'NE83406'  'NE83407'  'NE83432'  'NE83498'  'NE83T12' 
          'NE84557'  'NE85556'  'NE85623'  'NE86482'  'NE86501' 
          'NE86503'  'NE86507'  'NE86509'  'NE86527'  'NE86582' 
          'NE86606'  'NE86607'  'NE86T666'  'NE87403'  'NE87408' 
          'NE87409'  'NE87446'  'NE87451'  'NE87457'  'NE87463' 
          'NE87499'  'NE87512'  'NE87513'  'NE87522'  'NE87612' 
          'NE87613'  'NE87615'  'NE87619'  'NE87627'  'NORKAN' 
          'REDLAND'  'ROUGHRIDER'  'SCOUT66'  'SIOUXLAND'  'TAM107' 
          'TAM200'  'VONA' 

     yield a numeric vector

     latitude a numeric vector

     longitude a numeric vector


Source:

     Pinheiro, J. C. and Bates, D. M. (2000), _Mixed-Effects Models in
     S and S-PLUS_, Springer, New York.

