is_integer: Check if values are integers and convert to integer

In Rfast: A Collection of Efficient and Extremely Fast R Functions

Check if values are integers and convert to integer

Description

Check if values are integers and convert to integer.

Usage

is_integer(x)
as_integer(x,result.sort = TRUE,init = 1)

Arguments

x	is_integer: A vector with numeric data. as_integer: A vector with data.
result.sort	A logical value for sorting the result.
init	An integer value to start.

Details

The behavior of these functions are different than R's built in.

is_integer: check if all the values are integers in memory. If typeof is double, and the values are integers in range -2^31 : 2^31 then it is better to convert to integer vector for using less memory. Also you can decrease the time complexity.

as_integer: converts the discrete values to integers.

Value

is_integer: A logical value, TRUE if all values are integers and in range -2^31 : 2^31. Otherwise FALSE.

as_integer: By default the function will return the same result with "as.numeric" but the user can change the "init" value not start from 1 like R's. Also the result can be unsorted using "result.sort".

Author(s)

R implementation and documentation: Manos Papadakis <[e-mail]>.

See Also

as_integer, colVars, colmeans, read.directory

Examples

x<-runif(10)
y1<-is_integer(x) # y1 is FALSE
x<-as.numeric(rpois(10,10)) # integers but typeof is double
y1<-is_integer(x) # y1 is TRUE so you can convert to integer vector.

as_integer(letters) ## as.numeric(letters) produce errors
x<-y1<-NULL

Rfast documentation built on Nov. 9, 2023, 5:06 p.m.