is.factor-methods: Detect whether a 'db.obj' object is a categorical object

In greenplum-db/GreenplumR: A Fast, Easy-to-Use Tool for Manipulating Tables in Databases

Detect whether a db.obj object is a categorical object

Description

This function detects whether a db.obj object is a categorical object.

Usage

## S4 method for signature 'db.obj'
is.factor(x)

Arguments

x	A db.obj object.

Value

A logical value. When all columns of db.obj are categorical variables, this function returns TRUE.

Author(s)

Author: Predictive Analytics Team at Pivotal Inc.

Maintainer: Frank McQuillan, Pivotal Inc. [e-mail]

See Also

as.factor,db.obj-method converts a column db.obj of into categorical variables.

Examples

## Not run: 


## set up the database connection
## Assume that .port is port number and .dbname is the database name
cid <- db.connect(port = .port, dbname = .dbname, verbose = FALSE)

## create a table from the example data.frame "abalone"
x <- as.db.data.frame(abalone, conn.id = cid, verbose = FALSE)

## set sex to be a categorical variable
x$sex <- as.factor(x$sex)

is.factor(x$sex)

is.factor(x)

db.disconnect(cid, verbose = FALSE)

## End(Not run)

greenplum-db/GreenplumR documentation built on Sept. 2, 2023, 8:09 a.m.