R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'Matrix'

Matrix::Comparisons |  | Comparisons of Least Squares calculation speeds | PDF | source | R code
Matrix::Design-issues |  | Design Issues in Matrix package Development | PDF | source | R code
Matrix::Intro2Matrix |  | 2nd Introduction to the Matrix Package | PDF | source | R code
Matrix::Introduction |  | Introduction to the Matrix Package | PDF | source | R code
Matrix::sparseModels |  | Sparse Model Matrices | PDF | source | R code

## Other files in the doc directory

| SuiteSparse/