Sort: Sort - Integer Sort - Sort a vector coresponding to another

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

Sort - Integer Sort - Sort a vector coresponding to another

Description

Fast sorting a vector.

Usage

Sort(x,descending=FALSE,partial=NULL,stable=FALSE,na.last=NULL,parallel = FALSE)
Sort.int(x)
sort_cor_vectors(x, base, stable = FALSE, descending = FALSE)

Arguments

x	A numerical/integer/character vector with data.
base	A numerical/character vector to help sorting the x.
descending	A boolean value (TRUE/FALSE) for sorting the vector in descending order. By default sorts the vector in ascending.
partial	This argument has two usages. The first is an index number for sorting partial the vector. The second is a vector with 2 values, start and end c(start,end). Gives you a vector where the elements between start and end will be sorted only. Not character vector.
stable	A boolean value (TRUE/FALSE) for choosing a stable sort algorithm. Stable means that discriminates on the same elements. Not character vector.
na.last	Accept 4 values. TRUE, FALSE, NA, NULL. TRUE/FALSE: for put NAs last or first. NA: for remove NAs completely from vector. NULL: by default. Leave it like that if there is no NA values.
parallel	Do you want to do it in parallel, in C++? TRUE or FALSE. (Supported on Windows and most of the unix)

Details

This function uses the sorting algorithm from C++. The implementation is very fast and highly optimised. Especially for large data.

Value

Sort and Sort.int: The sorted vector.

sort_cor_vectors: The first argument but sorted acording to the second.

Author(s)

Manos Papadakis

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

See Also

nth, colnth, rownth,sort_unique, Round

Examples

x <- rnorm(1000)
s1 <- Sort(x)
s2 <- sort(x)
all.equal(s1,s2) #true  but not if many duplicates.

s1 <- Sort(x,partial=100)
s2 <- sort(x,partial=100)
all.equal(s1,s2) #true


s1 <- Sort(x,stable=TRUE)
s2 <- sort(x)
all.equal(s1,s2) #true

x <- as.character(x)
s1 <- Sort(x)
s2 <- sort(x)
all.equal(s1,s2) #true

y <- runif(1000)
b <- sort_cor_vectors(x,y)

x<-rpois(100,100)
all.equal(Sort.int(x),sort.int(x))

x<-y<-y<-s1<-s2<-NULL

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