create.filter.expression: create.filter.expression

In dachosen1/DTwrappers: Wrapper for the data.table package

Description

A function that creates filter expressions. Expression could be a character value, logical value, or expression stating the logical operations.

Usage

create.filter.expression(the.filter)

Arguments

the.filter

The filter criteria could be a character value, logical value, or expression stating the logical operations to be performed in filtering the data.

Examples

age.name = "Age"
region.name = "Region"

create.filter.expression(the.filter = NULL)
create.filter.expression(the.filter = c(age.name, region.name))
create.filter.expression(the.filter = age.name == region.name)
create.filter.expression(the.filter = "get(region.name) == 'South'")
create.filter.expression(the.filter = "get(age.name) > 20")
create.filter.expression(the.filter = "get(region.name) == 'South' & get(age.name) > 20")

dachosen1/DTwrappers documentation built on Dec. 25, 2019, 8:04 a.m.