kvec_from_template_byname: Create a constant vector from matrix 'a'

In matsbyname: An Implementation of Matrix Mathematics that Respects Row and Column Names

Create a constant vector from matrix a

Description

This function creates a vector using a as a template and k as its value. Row names are taken from the row names of a. The column name of the output is given by colname. Row and column types are transferred from a to the output, directly.

Usage

kvec_from_template_byname(a, k = 1, colname = NA, column = TRUE)

Arguments

a	The template matrix for the column vector.
k	The value of the entries in the output column vector.
colname	The name of the output vector's 1-sized dimension (the only column if column is TRUE, the only row otherwise).
column	Tells whether a column vector (if TRUE, the default) or a row vector (if FALSE) should be created.

Details

If column is TRUE, the output is a column vector with row names taken from row names of a and a column named by colname. If column is FALSE, the output is a row vevtor with column names taken from column names of a and a row named by colname.

If the class of a is Matrix, the output object will be a Matrix. Otherwise, the class of the output object will be a matrix.

Value

A vector vector formed from a.

Examples

kvec_from_template_byname(matrix(42, nrow = 4, ncol = 2,
                                 dimnames = list(c("r1", "r2", "r3", "r4"), c("c1", "c2"))), 
                          colname = "new column")
kvec_from_template_byname(matrix(42, nrow = 4, ncol = 2,
                                 dimnames = list(c("r1", "r2", "r3", "r4"), c("c1", "c2"))), 
                          colname = "new row", column = FALSE)

matsbyname documentation built on June 8, 2025, 10:08 a.m.