plot.lda                package:MASS                R Documentation

Plot Method for Class 'lda'

Description:

     Plots a set of data on one, two or more linear discriminants.

Usage:

     ## S3 method for class 'lda':
     plot(x, panel = panel.lda, ..., cex = 0.7, dimen,
          abbrev = FALSE, xlab = "LD1", ylab = "LD2")

Arguments:

       x: An object of class '"lda"'. 

   panel: the panel function used to plot the data. 

     ...: additional arguments to 'pairs', 'ldahist' or 'eqscplot'. 

     cex: graphics parameter 'cex' for labels on plots. 

   dimen: The number of linear discriminants to be used for the plot;
          if this exceeds the number determined by 'x' the smaller
          value is used. 

  abbrev: whether the group labels are abbreviated on the plots. If
          'abbrev > 0' this gives 'minlength' in the call to
          'abbreviate'. 

    xlab: label for the x axis 

    ylab: label for the y axis 

Details:

     This function is a method for the generic function 'plot()' for
     class '"lda"'. It can be invoked by calling 'plot(x)' for an
     object 'x' of the appropriate class, or directly by calling
     'plot.lda(x)' regardless of the class of the object.

     The behaviour is determined by the value of 'dimen'. For 'dimen >
     2', a 'pairs' plot is used. For 'dimen = 2', an equiscaled scatter
     plot is drawn. For 'dimen = 1', a set of histograms or density
     plots are drawn.  Use argument 'type' to match '"histogram"' or
     '"density"' or '"both"'.

References:

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

See Also:

     'pairs.lda', 'ldahist', 'lda', 'predict.lda'

