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possible issue with scatterplot function in car package

2 messages · Yousri Fanous, Rolf Turner

Yousri Fanous
# 
library (car)

 aa <- data.frame(x=c(2,  5, 6, 7, 8),
+  y=c(5,  10, 9, 12, 11),
+ ch=c("N",  "Q", "R", "S", "T"),
+ stringsAsFactors=FALSE)

scatterplot(aa$x,aa$y,smooth = FALSE, grid = FALSE, frame = FALSE,regLine=F)

Both x and y boxplots are correct
and in particular the median of the x box is at 6 which is confirmed
[1] 6

Now I do only one addition to the scatterplot: I add xlim
FALSE,regLine=F,xlim=c(0,8))

This causes the boxplot on x-axis to be in error:
1) the lower whisker starts now from zero
2) the median is between 4 and 6 and no longer at 6 as before
R version 3.6.3 (2020-02-29)
 [1] car_3.0-7
Rolf Turner
#
On 3/05/20 11:30 am, Yousri Fanous wrote:

            

      
      
      
    

        
(1) Please present data using dput(); this makes life a lot easier for 
your respondents.  (See posting guide.)

(2) Please do not post in html.  (See posting guide.)

(3) I agree that this looks like a bug.

(4) Email about issues like this should be sent to the maintainer of the 
package in question (see maintainer("car")) and not to r-help.

cheers,

Rolf Turner