In R graphics, what is the different between plotting characters (pch) 16 and 19?

Question

I can\'t find any documentation other than mentions of \"filled\" vs \"solid\".

library(graphics)
plot.new()
points(.48, .5, pch=19)
points(.52, .5, pch=16)
         


        

Answer 1

I used your code, and saving the image as svg.

When opening in Inkscape, the different is that 19 has a "stroke", that is a border. 16 does not.

Note that this is not a separate shape, but within the same shape.