"small car example" is this what you refer to?
load carsmall
gscatter(Weight,MPG,Model_Year,'','xos')
"annotate a group" I don't understand what you mean. gscatter does not have an annotate option, or does it?
When posing a question try to make it simple to answer.
.
Something similar to the carsmall plot can be created with
plot( x1, y1, ... )
hold on
plot( x2, y2, ... )
plot( x3, y3, ... )
legend( ..... )
The two subsequent plots might(?) change the range of the axes. My way of fixing that is
axh = gca;
set( axh, 'Xlim', [0,2] )
set( axh, 'Ylim', [0,2] )
However, there is a special command
xlim([xmin,xmax])
which operates on the current axes.
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There is also a low level way:
- create an axes (handle graphic ) object
- create three line objects, which are children to the axes
- ...
