Plot probability density

[HeinrichApfelmus]

The previous prototype included a function asDiscretePDF to plot the probability density of a ΔQ, as opposed to the cumulative distribution function. This is missing from this version.

However, if I recall correctly, the appropriate visualization of delta functions was unresolved.

It may be that plotting the probability density has little value.

This is mostly a convenience function which can be implemented using existing functionality.

[semanticphilosopher]

However, if I recall correctly, the appropriate visualisation of delta functions was unresolved

I did work that out (with vertical lines of the appropriate probability mass) , however this was based on transforming the piecewise representation with lines for Dirac and interpolation for polynomial segments