# histGroup: plot histogram for multiple groups. In Morpho: Calculations and Visualisations Related to Geometric Morphometrics

## Description

plot a histogram for multiple groups, each group colored individually

## Usage

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15``` ```histGroup( data, groups, main = paste("Histogram of", dataname), xlab = dataname, ylab, col = NULL, alpha = 0.5, breaks = "Sturges", legend = TRUE, legend.x = 80, legend.y = 80, legend.pch = 15, freq = TRUE ) ```

## Arguments

 `data` vector containing data. `groups` grouping factors `main, xlab, ylab` these arguments to title have useful defaults here. `col` vector containing color for each group. If NULL, the function "rainbow" is called. `alpha` numeric between 0 and 1. Sets the transparency of the colors `breaks` one of: a vector giving the breakpoints between histogram cells, a single number giving the number of cells for the histogram, a character string naming an algorithm to compute the number of cells (see ‘Details’), a function to compute the number of cells. In the last three cases the number is a suggestion only. `legend` logical: if TRUE, a legend is plotted `legend.x` x position of the legend from the upper left corner `legend.y` y position of the legend from the upper left corners `legend.pch` integer: define the symbol to visualise group colors (`points`) `freq` logical: if TRUE, the histogram graphic is a representation of frequencies, the counts component of the result; if FALSE, probability densities are plotted for each group.

## Details

Just a wrapper for the function hist from the "graphics" package

## Author(s)

Stefan Schlager

`hist`
 ```1 2``` ```data(iris) histGroup(iris\$Petal.Length,iris\$Species) ```