Subject: XploRe: Learning Guide
See XploRe:

Quantlet: graph47
Description: First two principal components based on the correlation matrix.
Download: graph47.xpl

Code:
  library("plot")            ; loads library plot
  data = read ("bostonh")    ; reads Boston Housing data
  col  = grc.col.green-grc.col.blue
  col  = grc.col.blue+col*(data[,14]<mean(data[,14])) 
                             ; colors observations blue and green
  plot2 (data, grc.prep.pcacorr, col)    
                             ; plots two first principal axes



Subject: XploRe: Learning Guide
See XploRe:

© MD*Tech - Method and Data Technologies, generated on 6.6.2000 .