R: Class intervals for a histogram, the rule of Sturges

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`, `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 1.2-8 Index]