cat_cont {catcont}

categorical or continuous variables

Description

These functions facilitate working with variables as categorical or continous rather than logical, integer, numeric, factor, character, ..

Usage

cat_cont(x)

is_cat(x)

## Default S3 method:
is_cat(x)

## S3 method for class 'ordered'
is_cat(x)

## S3 method for class 'factor'
is_cat(x)

## S3 method for class 'logical'
is_cat(x)

is_cont(x)

## Default S3 method:
is_cont(x)

## S3 method for class 'logical'
is_cont(x)

## S3 method for class 'factor'
is_cont(x)

## S3 method for class 'ordered'
is_cont(x)

which_cat(x, ..., names = FALSE)

which_cont(x, ..., names = FALSE)

Arguments

x

object

...

arguments passed to other functions.

names

logical; whether to return the names of the variables instead of their index?

Details

These functions are used to test and identify which/if a variable or variables are categorical or continuos. is_cat and is_cont take single variable arguments.

Mostly, the categorical and continuos assessment is straight- forward. Continuous variables are respresented by integer, double or complex types. All other types are categorical. There are a few opinionated exceptions:

• factors are categorical (though typed 'integer')

• ordered factors are (though typed 'integer')

• logical are categorical

For simplicity, it is assumed that a vector cannot be simultaneous categorical and continous, though in some cases (e.g. ordered factors) this may be the case.

Value

cat_cont returns a named character with values either "cat" or "cont". If x is a atomic vector, a single string is given. If x is recursive, a "cat"/"cont" value is given for each element. Names correspond to the names of the element.

is_cat and is_cont return logical.

which_cat and which.cont report which variables in an object are categorical and continuous. By default, interger indices are return. If names=TRUE, the names of the variables are returned instead.

See Also

• base::typeof()

• base::is.numeric() methods::is()

• base::which()

Examples

  data(iris)
  cat_cont(iris)


  is_cat(letters)          # TRUE
  is_cat(factor(letters))  # TRUE
  is_cat(TRUE)             # TRUE
  is_cat(FALSE)            # TRUE
  is_cat(1:10)             # FALSE
  is_cat(rnorm(10))        # FALSE
  is_cat( Sys.Date() )     # FALSE
  is_cat( complex(1,2) )   # FALSE

  is_cont(letters)         # FALSE
  is_cont(factor(letters)) # FALSE
  is_cont(TRUE)            # FALSE
  is_cont(FALSE)           # FALSE
  is_cont(1:10)            # TRUE
  is_cont(rnorm(10))       # TRUE
  is_cont( Sys.Date() )    # TRUE
  is_cont( complex(1,2) )  # TRUE

  which_cat(iris)
  which_cat( iris, names=TRUE )

  which_cont(iris)
  which_cont( iris, names=TRUE )