Explanation:The ggplot2 package, created by Hadley Wickham, offers a powerful graphics language for creating elegant and complex plots. 7. For barchart and _________, non-trivial methods exist for tables and arrays, documented at barchart.table.
A. scatterplot
B. dotplot
C. xyplot
D. All of the mentioned
Answer:A
Explanation:The ggplot2 package, created by Hadley Wickham, offers a powerful graphics language for creating elegant and complex plots. 7. For barchart and _________, non-trivial methods exist for tables and arrays, documented at barchart.table.
A. scatterplot B. dotplot C. xyplot D. All of the mentioned
Explanation:The numeric methods are equivalent to a call with no left hand side and no conditioning variables in the formula. 8. What is a geom in the ggplot2 system ?