Weight and See

Weights are important in many areas of statistics, particularly in
surveys and in model-fitting algorithms.  They are not often used in
graphical displays, although it is easy to incorporate weights in most
standard displays, especially area ones, and they add considerable
flexibility and exploratory power.  Interpretation of weighted displays
is not always easy, though difficulties in interpretation apply to all
graphics.   With weighted displays the main problem arises in taking
proper account of what kinds of weights are being used.

This paper discusses weighting and weighted graphical displays in
general.  It describes how weighted displays can be used both statically
and interactively.