extract {gmp}

Extract or Replace Parts of an Object

Description

Operators acting on vectors, arrays and lists to extract or replace subsets.

Usage

## S3 method for class 'bigz'
x[i=NULL, j=NULL, drop = TRUE]
## S3 method for class 'bigq'
x[i=NULL, j=NULL, drop = TRUE]

##_______ In the following, only the bigq method is mentioned: ______
## S3 method for class 'bigq'
c(..., recursive = FALSE)
## S3 method for class 'bigq'
rep(x, times=1, length.out=NA, each=1, ...)

Arguments

x

R object of class "bigz" or "bigq", respectively.

...

further arguments, notably for c().

i, j

indices, see standard R subsetting and subassignment.

drop

logical, unused here.

times, length.out, each

integer; typically only one is specified; for more see rep (standard R, package base).

recursive

unused here

Note

Unlike standard matrices, x[i] and x[i,] do the same.

Examples

  a <- as.bigz(123)
  ## indexing "outside" --> extends the vectors (filling with NA)
  a[2] <- a[1]
  a[4] <- -4

  ## create a vector of 3 a
  c(a,a,a)

  ## repeate a 5 times
  rep(a,5)

  ## with matrix
  m <- matrix.bigz(1:6,3)

  ## these do the same:
  m[1,]
  m[1]
  m[-c(2,3),]
  m[-c(2,3)]
  m[c(TRUE,FALSE,FALSE)]

  ##_modification on matrix
  m[2,-1] <- 11