Area normalisation of density estimates

In studies involving multiple samples, it is useful to normalise the area under the density estimates to a common value. The area under the KDE is reported in the Options → Settings menu. When the normalise checkbox is selected, the areas under the KDE, histogram (and PDP) are normalised to the same value. In this case, the default histogram binwidth is reduced. This value can, of course, be changed to any other value. The area value can be accessed from the command line, facilitating the generation and intercomparison of multiple samples.