Plot1D In this plotting mode, the selected variable is displayed in one of two ways: 1) as a vertical strip chart, like a jittered dot plot. The method used is described in "Strips Displaying Empirical Distributions: I. Textured Dot Strips" by John Tukey and Paul Tukey. 2) as an average shifted histogram (ASH), as designed by David W. Scott. The ASH has a smoothness parameter, which is the ratio of the number of shifted histograms to the number of bins. This view can be activated from the keyboard by typing d or D.