Append: Append Elements to Objects

In DescTools: Tools for Descriptive Statistics

Append Elements to Objects

Description

Append elements to a number of various objects as vectors, matrices, data.frames and lists. In a matrix either rows or columns can be inserted at any position. In data frames any vectors can be inserted. values will be recycled to the necessary length.

Usage

Append(x, values, after = NULL, ...)

## S3 method for class 'matrix'
Append(x, values, after = NULL, rows = FALSE, names = NULL, ...)
## S3 method for class 'data.frame'
Append(x, values, after = NULL, rows = FALSE, names = NULL, ...)
## Default S3 method:
Append(x, values, after = NULL, ...)

Arguments

x	object for the elements to be inserted
values	the elements to be inserted
after	a subscript, after which the values are to be appended. If it's missing the values will be appended after the last element (or column/row).
rows	logical, defining if vector should be added as row or as column. Default is column (rows=FALSE).
names	the dimension names for the inserted elements(s)
...	further arguments (not used here)

Details

The vector x will be recycled to a length of the next multiple of the number of rows (or columns) of the matrix m and will be inserted such that the first inserted row (column) has the index i. If the dimnames are given, they will be used no matter if the matrix m has already dimnames defined or not.

Value

An object containing the values in x with the elements of values appended after the specified element of x.

Author(s)

Andri Signorell <[e-mail]>

See Also

rbind, cbind, append

Examples

Append(1:5, 0:1, after = 3)    # the same as append

# Insert columns and rows
x <- matrix(runif(25), 5)

Append(x, values=1:10, after=2, names = c("X","Y"))
Append(x, values=1:10, after=2)

Append(x, values=1:10, after=2, names = c("X","Y"))
Append(x, values=1:10, after=2)

# append to a data.frame
d.frm <- data.frame("id"   = c(1,2,3),
                    "code" = c("AAA", "BBB", "CCC"),
                    "val"  = c(111, 222, 333))
z <- c(10, 20, 30)

Append(d.frm, z, after=2, names="ZZZ")

DescTools documentation built on April 4, 2025, 1:55 a.m.