Why do you want to change your dot size, when you can chose filled circles as symbols?
Try this command:
plot ... with points pointtype 7 pointsize 5
Here
pointtype
(or pt
) allows you to select different symbols (Each terminal has a default set of line and point types, which can be seen by using the command test
, e.g. pngcairo: pt 5
would be a filled square)
pointsize
(or ps
) allows you to control the size, as you had mentioned before.
I think the difference between a dot
and a point
is, that dot
will always be a pixel-dot. If you are looking for more flexibility, points
will allow that.