Error: could not find function "ggplot2"

Generally we got error in "R tool" while executing "ggplot" command
Following Error occurs :
Error: could not find function "ggplot2"

Solution :

1) Install following packages from R tool console 

> install.packages("ggplot2")

2) Load package:

> library(ggplot2)

3) Load csv:  (For Example )

df=read.csv("C://amit/R-tool.csv")
attach(df)
ggplot(df, aes(x = ReqBody, y = A_us)) + geom_point() + facet_grid(~ResBody+ResHeader+ReqHeader)

Hope this solution will resolve this error. 

 
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