plot.descript: Descriptive Statistics Plot method

Description Usage Arguments Author(s) See Also Examples

View source: R/plot.descript.R

Description

The plot method for descript objects currently works for dichotomous response patterns, and produces the xy-plot of the total score versus the proportion of correct responses for each item.

Usage

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## S3 method for class 'descript'
plot(x, items = NULL, includeFirstLast = FALSE, xlab, ylab, ...)

Arguments

x

an object inheriting from class descript.

items

a numeric vector indicating which items to plot.

includeFirstLast

logical; if TRUE the first and last total scores categories are included.

xlab, ylab

character string or an expression; see title.

...

extra graphical parameters to be passed to matplot().

Author(s)

Dimitris Rizopoulos d.riz[email protected]

See Also

descript

Examples

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## Descriptives for WIRS data:
dsc <- descript(WIRS)
dsc
plot(dsc, includeFirstLast = TRUE, type = "b", lty = 1, pch = 1:6)
legend("topleft", names(WIRS), pch = 1:6, col = 1:6, lty = 1, bty = "n")

drizopoulos/ltm documentation built on April 19, 2018, 2:37 a.m.