convert {lazy.tools}

R Documentation

Convert the columns of a data frame to a specific type/class.

Description

Convert the columns of a data frame to a specific type/class.

Usage

convert(X, what = "factor", func = as.character)

Arguments

X	A Data Frame or a Matrix
what	A character vector of class names, or "ANY" to match any class where class names can be "factor", "character", "numeric" etc.
func	The function to be used for the conversion.

Details

This function returns
rapply( X, func, classes=what, how="replace" )

The same can be obtained by:
loc <- which( sapply(vartype(X), "%in%", what ) )
X[loc] <- lapply( X[loc], func )

Value

X with the converted values.

Examples

A <- demomat(5,3,root="")
Af <- as.data.frame(A)
Af[,2]=as.numeric(Af[,2])
str(Af)

Ac <- convert( Af )
str(Ac)

Ac <- convert( Af, what=c("factor","numeric") )
str(Ac)

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