DAAG: onesamp – R documentation

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onesamp

Paired Sample t-test

Description

This function performs a t-test for the mean difference for paired data, and produces a scatterplot of one column against the other column, showing whether there was any benefit to using the paired design.

Usage

onesamp(dset, x="unsprayed", y="sprayed", xlab=NULL, ylab=NULL,
        dubious=NULL, conv=NULL, dig=2)

Arguments

`dset`	a matrix or dataframe having two columns
`x`	name of column to play the role of the ‘predictor’
`y`	name of column to play the role of the ‘response’
`xlab`	horizontal axis label
`ylab`	vertical axis label
`dubious`	vector of logical (`FALSE`/`TRUE`) values, specifying points that are to be omitted
`conv`	scaling factor that should be applied to data
`dig`	round SE to this number of digits for dispplay on graph

Value

A scatterplot of y against x together with estimates of standard errors and standard errors of the difference (y-x).

Also produced is a confidence interval and p-value for the test.

Author(s)

J.H. Maindonald

Examples

onesamp(dset = pair65, x = "ambient", y = "heated", xlab =
        "Amount of stretch (ambient)", ylab =
        "Amount of stretch (heated)")

DAAG

Data Analysis and Graphics Data and Functions

v1.24

GPL-3

Authors

John H. Maindonald and W. John Braun

Initial release