Calculate number of elements for matrix specification

Source: R/NMreadInits.R

calculate number of elements in the diagonal and lower triangle of a squared matrix, based on the length of the diagonal.

triagSize(diagSize)

Arguments

diagSize

The length of the diagonal. Same as number of rows or columns.

Value

An integer

Examples

triagSize(1:5)
#> [1]  1  3  6 10 15