The R Project SVN R

Rev

Rev 89404 | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 89404 Rev 89663
Line 48... Line 48...
48 
  choosing the bandwidth of a Gaussian kernel density estimator.
 48 
  choosing the bandwidth of a Gaussian kernel density estimator.
49 
  It defaults to 0.9 times the
 49 
  It defaults to 0.9 times the
50 
  minimum of the standard deviation and the interquartile range divided by
 50 
  minimum of the standard deviation and the interquartile range divided by
51 
  1.34 times the sample size to the negative one-fifth power
 51 
  1.34 times the sample size to the negative one-fifth power
52 
  (= \I{Silverman}'s \sQuote{rule of thumb},
 52 
  (= \I{Silverman}'s \sQuote{rule of thumb},
53 
  \bibcitet{|R:Silverman:1986|page 48\, \abbr{eqn} (3.31)})
 53 
  \bibcitet{|R:Silverman:1986|equation 3.31 on page 48})
54 
  \emph{unless} the quartiles coincide when a positive result
 54 
  \emph{unless} the quartiles coincide when a positive result
55 
  will be guaranteed.
 55 
  will be guaranteed.
56 
 
 56 
 
57 
  \code{bw.nrd} is the more common variation given by
 57 
  \code{bw.nrd} is the more common variation given by
58 
  \bibcitet{R:Scott:1992}, using factor 1.06.
 58 
  \bibcitet{R:Scott:1992}, using factor 1.06.