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 |

### Author(s)

Felipe de Mendiburu

### See Also

`polygon.freq`

, `table.freq`

, `stat.freq`

,
`inter.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 1.3-7 Index]