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.

`polygon.freq`, `table.freq`, `stat.freq`, `intervals.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 1.3-5 Index]