Add plots to R guide (#25444)

* Add plots to R guide

* Deleted plotting file

* added a plotting index.md for R

guide/english/r/plotting/index.md

@@ -0,0 +1,16 @@
+---
+title: Plotting in R
+---
+## Plotting
+ The base version of R allows us to make many types of plots!
+ The syntax for a simple scatterplot goes something like this: 
+ ```r
+plot(x, y) 
+```
+We create a graph using the plot() function and supply the two parameters, x and y, which are the two columns you want to plot in your dataset.
+ So in the mpg dataset that is available in the tidyverse library, if we wanted to make a scatterplot of the two variables 'cyl' and 'hwy':
+ ```r
+library(tidyverse)
+attach(mpg)
+plot(cyl, hwy) 
+```