I want to plot all the data in a "line", however, I also want to
put some "point marks" (such as rectangle, asterisk etc) for some
of the points. Can anyone help me on this?
Basically, I have a large set of data, if I use linespoints for ploting, I
cannot differeniate the linespoints for different data set (because there
are so many points). On the other hand, if I use the every command, some
data value will be ignored.