scatterplot {SSRA} | R Documentation |
Scatterplot Matrices
Description
This function produces a scatterplot matrix
Usage
scatterplot(data, select = NULL, type = c("jitter", "size", "count", "sun"))
Arguments
data |
a data frame |
select |
select items to be plotted |
type |
type of plot, i.e., 'jitter', 'size', 'count', and 'sun' |
Details
Using a scatterplot matrix, an overview of the answer patterns for the pairs of items can be taken.
Author(s)
Takuya Yanagida takuya.yanagida@univie.ac.at, Keiko Sakai keiko.sakai@oit.ac.jp
References
Takeya, M. (1991). A new test theory: Structural analyses for educational information. Tokyo: Waseda University Press.
See Also
Examples
# Example data based on Takeya (1991)
# Select items to be plotted
scatterplot(exdat, select = c("Item2", "Item3", "Item4"))
# Scatterplot matrix: jitter
scatterplot(exdat)
# Scatterplot matrix: size
scatterplot(exdat, type = "size")
# Scatterplot matrix: count
scatterplot(exdat, type = "count")
# Scatterplot matrix: sun
scatterplot(exdat, type = "sun")
[Package SSRA version 0.1-0 Index]