On Dec 14, 6:04 am, djh <halitsk...@att.net> wrote: > When comparing one or more (x,y) plots to the reference line segment > [(0,0),(1,1)] (as you instructed in your post of 12/13 @ 6/27: > > ?The best way to see the difference between the plots is to take cols > 2 & 3 as x & y coordinates, then plot the points along with a line > from (0,0) to (1,1).? > > do all x and y values have to be scaled to [0,1] before plotting the > (x,y) pairs? > > If so, what is the ?correct? (or ?best? or ?standard?) way to scale > the numbers for: > > a) one pair of (x,y) columns? > > b) more than one pair of (x,y) columns ? > > Thanks for considering this additional question.
In this case all the values were naturally in [0,1], so the reference line was obvious once I'd seen the plot. In general, tho, there is no standard procedure. You need both some idea of how the curves might differ and a "sense of the data" to know what rescalings may be permissible. It's an art, not a science.