toVariable {crunch}R Documentation

Generic method for converting objects to Crunch representations

Description

R objects are converted to Crunch objects using the following rules:

Usage

toVariable(x, ...)

## S4 method for signature 'CrunchVarOrExpr'
toVariable(x, ...)

## S4 method for signature 'character'
toVariable(x, ...)

## S4 method for signature 'numeric'
toVariable(x, ...)

## S4 method for signature 'factor'
toVariable(x, ...)

## S4 method for signature 'Date'
toVariable(x, ...)

## S4 method for signature 'POSIXt'
toVariable(x, ...)

## S4 method for signature 'AsIs'
toVariable(x, ...)

## S4 method for signature 'VariableDefinition'
toVariable(x, ...)

## S4 method for signature 'logical'
toVariable(x, ...)

## S4 method for signature 'labelled'
toVariable(x, ...)

## S4 method for signature 'haven_labelled'
toVariable(x, ...)

## S4 method for signature 'labelled_spss'
toVariable(x, ...)

## S4 method for signature 'haven_labelled_spss'
toVariable(x, ...)

Arguments

x

An R vector you want to turn into a Crunch variable

...

Additional metadata fields for the variable, such as "name" and "description". See the API documentation for a complete list of valid attributes.

Details

If you have other object types you wish to convert to Crunch variables, you can declare methods for toVariable.

Value

A VariableDefinition object. To add this to a dataset, either assign it into the dataset (like ds$newvar <- toVariable(...)) or call addVariables(). If you're adding a column of data to a dataset, it must be as long as the number of rows in the dataset, or it may be a single value to be recycled for all rows.

See Also

VariableDefinition() addVariables()

Examples

var1 <- rnorm(10)
toVariable(var1)
toVariable(var1, name = "Random", description = "Generated in R")
## Not run: 
ds$random <- toVariable(var1, name = "Random")
# Or, this way:
ds <- addVariables(ds, toVariable(var1, name = "Random"))

## End(Not run)

[Package crunch version 1.30.1 Index]