sturges.freq {agricolae} | R Documentation |
Class intervals for a histogram, the rule of Sturges
Description
if k=0 then classes: k = 1 + log(n,2). if k > 0, fixed nclass.
Usage
sturges.freq(x,k=0)
Arguments
x |
vector |
k |
constant |
Value
Statistics of sturges for a histogram.
Author(s)
Felipe de mendiburu
References
Reza A. Hoshmand. 1988. Statistical Methods for Agricultural Sciences, Timber Press, Incorporated, pag 18-21.
See Also
polygon.freq
, table.freq
, stat.freq
,
inter.freq
, graph.freq
, join.freq
,
ogive.freq
, normal.freq
Examples
library(agricolae)
data(natives)
classes<-with(natives,sturges.freq(size))
# information of the classes
breaks <- classes$breaks
breaks
#startgraph
# Histogram with the established classes
h<-with(natives,graph.freq(size,breaks,frequency=1, col="yellow",axes=FALSE,
xlim=c(0,0.12),main="",xlab="",ylab=""))
axis(1,breaks,las=2)
axis(2,seq(0,400,50),las=2)
title(main="Histogram of frequency\nSize of the tubercule of the Oca",
xlab="Size of the oca", ylab="Frequency")
#endgraph
[Package agricolae version 1.3-7 Index]