 All grafụ nakwụkwọ a e kere ke R Team 2016 , na-eji ndị na-esonụ nchịkọta: ggplot2 Wickham 2009 , dplyr Wickham and Francois 2015 , reshape2 Wickham 2007 , stringr Wickham 2015 , ụgbọ ala Fox and Weisberg 2011 , cowplot Wilke 2016 , PNG Urbanek 2013 , okporo Team 2016 , ggrepel Slowikowski 2016 , na emojifont Yu 2016 . 