crunch (version 1.0.2)

variable-extract: "Subset" a Variable

Description

These methods subset variables by creating Expressions, which can be composed and evaluated as needed.

Usage

## S3 method for class 'CrunchVariable,CrunchExpr':
[(x, i, j, ..., drop = TRUE)
## S3 method for class 'CrunchVariable,numeric':
[(x, i, j, ..., drop = TRUE)
## S3 method for class 'CrunchVariable,logical':
[(x, i, j, ..., drop = TRUE)

Arguments

x

a Variable

i

a CrunchExpr, logical, or numeric

j

Invalid

...

additional arguments, ignored

drop

Invalid

Value

• a CrunchExpr containing references to the variable x and the filter logic contained in i