pmml (version 2.1.0)

rename_wrap_var: Rename a variable in the xform_wrap transform object.

Description

Rename a variable in the xform_wrap transform object.

Usage

rename_wrap_var(wrap_object, wrap_data, xform_info = NA, ...)

Arguments

wrap_object

Wrapper object obtained by using the xform_wrap function on the raw data.

wrap_data

Deprecated.

xform_info

Specification of details of the renaming.

…

Further arguments passed to or from other methods.

Value

R object containing the raw data, the transformed data and data statistics.

Details

Once input data is wrapped by the xform_wrap function, it is somewhat involved to rename a variable inside. This function makes it easier to do so. Given a variable named input_var and the name one wishes to rename it to, output_var, the rename command options are:

xform_info="input_var -> output_var"

There are two methods in which the variables can be referred to. The first method is to use its column number; given the data attribute of the boxData object, this would be the order at which the variable appears. This can be indicated in the format "column#". The second method is to refer to the variable by its name. This method will work even if the renamed value already exists; in which case there will be two variables with the same name.

If no input variable name is provided, the original object is returned with no renaming performed.

See Also

xform_wrap

Examples

# NOT RUN {
# Load the standard iris dataset, already built into R
data(iris)

# First wrap the data
iris_box <- xform_wrap(iris)

# We wish to refer to the variables "Sepal.Length" and
# "Sepal.Width" as "SL" and "SW"
iris_box <- rename_wrap_var(wrap_object = iris_box, xform_info = "column1->SL")
iris_box <- rename_wrap_var(wrap_object = iris_box, xform_info = "Sepal.Width->SW")
# }