Description Usage Arguments Details Value Author(s) See Also Examples

This function plots univariate and bivariate frequency tables of class
“`freqtab`

”.

1 2 3 4 5 6 |

`x` |
univariate or bivariate score distribution of class
“ |

`y` |
either an object of class “ |

`xcol, ycol` |
colors used in plotting |

`pch` |
plotting symbol used to plot bivariate points. |

`ylty` |
line type used to plot frequencies in |

`xlab` |
label for the x axis. |

`addlegend` |
logical indicating whether or not a legend should be added. |

`legendtext` |
character vector of text to be passed to the |

`ds, dm` |
integers for the scaling and center of the RGB density values,
with defaults of 50 and 100. These are used to convert the observed counts
in |

`...` |
further arguments passed to or from other methods, such as
graphical parameters besides |

For the points method, a scatterplot for `x`

is added to the current
opened plot.

For the plot method, when `x`

is univariate, i.e, having 2 columns, a
frequency plot is created for `x`

. When `x`

is bivariate, e.g.,
coming from a single group equating design or one form of a nonequivalent
groups design, a scatterplot is produced with frequency plots for the
marginal distributions.

`y`

is used to superimpose lines, e.g., smoothed frequencies, over the
(marginal) frequencies of `x`

.

Colors must be specified using `xcol`

and `ycol`

. When `ycol`

is missing, a vector of colors is created using `rainbow(ncol(y))`

.

The univariate option produces a single line plot of ```
type =
"h"
```

. Frequencies from `y`

are then superimposed. The bivariate option
produces a scatterplot with a marginal frequency plot for each distribution.

Anthony Albano [email protected]

`plot.table`

, `plot.equate`

,
`lines`

, `points`

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equate documentation built on May 29, 2017, 3:45 p.m.

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