[R] Histograms and Sturges rule
Paul Smith
phhs80 at gmail.com
Wed Nov 28 01:08:58 CET 2007
Dear All,
According to the Sturges rule, the number of classes of a histogram is
the closest integer to
1 + logb(n,base=2)
where n is the number of observations. The function hist(), by
default, uses the Sturges rule. However, the code
x <- 1:200
hist(x)
produces a histogram with 10 classes and not 9 classes as determined
by the Sturges rule. What am I missing?
Thanks in advance,
Paul
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