Example Data Set

Description

Data to illustrate the usage of pcpattL.

Usage

data(xmpl)

Format

A data frame with 100 observations on the following 5 variables.

I1

responses to first item, (1) strong agreement, to (5) strong disagreement

I2

responses to second item, like I1

I3

responses to thirs item, like I1

SEX

(1) male, (2) female

EDU

(1) low education, (2) high education

All values are numeric.

Details

Datasets and/or dataframes used in pcpattL are required to have the follwing structure:

• All values must be numeric.
• The item responses must be in the leftmost columns (such as I1 to I3 above).
• Categorical subject covariates follow the item responses (rightmost columns) and their levels must be specified as consecutive integers. If in a used datafile or dataframe these are defined as R factors they will be converted to integers. This is not possible if characters are used as factor levels and, consequently, pcpattL will produce an error.

Examples

data(xmpl)
head(xmpl)