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3 messages · Engin Yılmaz, Dr. Robin Haunschild, Rui Barradas

Engin Yılmaz
# 
Dear

I use dataset , as called "mpg"

This is code

ggplot(data=mpg)+ geom_point(mapping = aes(x=displ, y=hwy, colour=year))

But I would like to see only "year of 1999" in this relationship between x
and y variables

How could I change the code in this direction?

I found the following code

library(dplyr)year_1999 <- filter(mpg, year=="1999")ggplot(year_1999,
aes(x=displ, y=hwy)) + geom_point()


I found other code

ggplot(data = mpg, mapping = aes(x = displ, y = hwy)) +

    geom_point(

      data = filter(mpg, year == "1999")

    )


Is there more compact code ?


sincerely
Engin YILMAZ
Dr. Robin Haunschild
# 
Hi,

what about this one?

ggplot(data=mpg[mpg$year==1999,], aes(x=displ, y=hwy))+ geom_point()

Best, Robin
On 10/21/20 3:37 PM, Engin Y?lmaz wrote:

  
    

      
      
    

  


  


      

    

    

      
      

        


  

        

      Rui Barradas
    

    

      
      #
    

  


  

      
Hello,

You can subset the data argument.
And if you are plotting one year only, there's no point in color = year.

ggplot(subset(mpg, year == 1999), aes(displ, hwy)) +
   geom_point()


If you are loading package dplyr, you can filter directly to ggplot:


library(dplyr)

mpg %>%
   filter(year == 1999) %>%
   ggplot(aes(displ, hwy)) +
   geom_point()


Hope this helps,

Rui Barradas


?s 14:37 de 21/10/20, Engin Y?lmaz escreveu: