Graphing One Dimensional Numeric Data

A strip plot graphs one dimensional data by displaying each sample point as a point on a one dimensional axis. The main difficulties with this technique is (i) when several samples have identical values they will be printed on top of each other, and (ii) in the case of a large sample the graph will become overly crowded and less informative. The two ways to alleviate these difficulties are: (a) adding random noise to each sample point (this is called jittering), and (b) ploting each point in a transparent way so that many overlapping points are discernible from a single point or a few points. 1 > # Strip plot of diamond prices for several cuts. The plot if not very 2 > # informative due to overlapping values and overcrowding 3 > theme set(theme bw(base_size =8)); # for nice bw printing , decrease fonts 4 > png( ' fig1.png ' ,height =200); 5 > print(qplot(cut , price , data=diamonds)); 6 > invisible(dev.off ());