Converts the dates to different 'SAS' date formats. In 'SAS' dates are a special case of 
             numeric values. Each day is assigned a specific numeric value, starting from January 1, 1960.
             This date is assigned the date value 0, and the next date has a date value of 1 and so on.
             The previous days to this date are represented by -1 , -2 and so on. With this approach, 
             'SAS' can represent any date in the future or any date in the past. There are many date 
             formats used in 'SAS' to represent date-time. Here, we try to develop functions which will
             convert the date to different 'SAS' date formats.

This is a core implementation of 'SAS' procedures for linear models - GLM, REG, ANOVA, TTEST, FREQ, and UNIVARIATE. Some R packages provide type II and type III SS. However, the results of nested and complex designs are often different from those of 'SAS.' Different results does not necessarily mean incorrectness. However, many wants the same results to SAS. This package aims to achieve that. 
             Reference: Littell RC, Stroup WW, Freund RJ (2002, ISBN:0-471-22174-0).

Settings and functions to extend the 'knitr' 'SAS' engine.

Data sets and sample lmer analyses corresponding
  to the examples in Littell, Milliken, Stroup and Wolfinger
  (1996), "SAS System for Mixed Models", SAS Institute.

Provides a 'SAS' interface, through
    'SASPy'(<https://sassoftware.github.io/saspy/>) and
    'reticulate'(<https://rstudio.github.io/reticulate/>).  This package
    helps you create 'SAS' sessions, execute 'SAS' code in remote 'SAS'
    servers, retrieve execution results and log, and exchange datasets
    between 'SAS' and 'R'.  It also helps you to install 'SASPy' and
    create a configuration file for the connection. Please review the
    'SASPy' license file as instructed so that you comply with its
    separate and independent license.

An 'SCSS' compiler, powered by the 'LibSass' library. With this,
    R developers can use variables, inheritance, and functions to generate
    dynamic style sheets. The package uses the 'Sass CSS' extension language,
    which is stable, powerful, and CSS compatible.