Construct linear and quadratic trend columns

Usage

trend_columns(number_of_rows)

Arguments

number_of_rows
the number of rows in the input data set.

Value

A matrix with number_of_rows rows and 2 columns, one for linear trends and one for quadratic trends.

Description

This function returns a matrix of linear and quadratic trends.

Examples

autovarCore:::trend_columns(10)
index index2 [1,] 1 1 [2,] 2 4 [3,] 3 9 [4,] 4 16 [5,] 5 25 [6,] 6 36 [7,] 7 49 [8,] 8 64 [9,] 9 81 [10,] 10 100