Improve border line type experience

[AndreiKingsley]

Now it looks awful

[alshan]

Dotted lines look as expected , why?

[devcrocod]

When the line type is dotted, I expect to see the original line through the dots. In this case, it is not so.
Especially, you can see this on the last box with whiskers.

[alshan]

No, in ggplot "dotted" line consists of dots with the background in between. Take a look: http://www.cookbook-r.com/Graphs/Shapes_and_line_types/

To achieve visual effect that you needed try to combine two layers of boxes: dotted lines on top of solid lines.

[IKupriyanov-HORIS]

ggplot2 output for reference:

[devcrocod]

Okay, I was talking about understanding.
Here I have highlighted the problem areas:

Even the ggplot examples given here look cleaner

[alshan]

@IKupriyanov-HORIS Looks like ggplot adjusts dots size/distance to the line width.