R: Normal curve on the histogram

normal.freq {agricolae} | R Documentation

## Normal curve on the histogram

### Description

A normal distribution graph elaborated from the histogram previously constructed. The average and variance are obtained from the data grouped in the histogram.

### Usage

    normal.freq(histogram, frequency=1, ...)

### Arguments

`histogram` | object constructed by the function hist
`frequency` | 1=counts, 2=relative, 3=density
`...` | Other parameters of the function hist

### Value

`Histogram` | object
`frequency` | numeric
`probability` | logic False or True

### Author(s)

Felipe de Mendiburu

### See Also

`polygon.freq`, `table.freq`, `stat.freq`, `intervals.freq`, `sturges.freq`, `join.freq`, `ogive.freq`, `graph.freq`

### Examples

    library(agricolae)
    data(growth)
    #startgraph
    h1<-with(growth,hist(height,col="green",xlim=c(6,14)))
    normal.freq(h1,col="blue")
    #endgraph
    #startgraph
    h2<-with(growth,graph.freq(height,col="yellow",xlim=c(6,14),frequency=2))
    normal.freq(h2,frequency=2)
    #endgraph

[Package agricolae version 1.2-6 Index]