Relevant issue thread: #3753
Currently the daily burnt BSQ chart under 'DAO -> Facts and Figures' is
distorted by outliers. This introduces a 'Zoom to inliers' toggle (off
by default), which, when toggled on, effectively zooms the chart to
inliers, thus removing the distortion. Also, a moving average is
plotted, to further improve the chart's readibility.
The chart is also changed from an area chart to a line chart, on the
presumption that it was an area chart for cosmetic reasons, but now that
there are two series in it (the moving average was added) an area chart
makes less sense.
Another noteworthy change is that the other chart in the screen, monthly
issued BSQ, has its Y axis set to start at zero, so as to improve
readability. This might seem outside the scope of this commit, but the
other changes involved some refactoring, which involved cleaning up some
duplicated logic, which involved configuring both of these charts
together, which involved forcing zero to be on the axis.
This implementation mixes some plotting logic (responsible for zooming
in on inliers) into the view logic, because I opted to implement said
zooming as an external manipulation of a chart's axis. I chose this in
favor of implementing a new Chart, because it would have required
including multiple large classes (relevant JavaFX's classes can't be
ergonomically extended) to the code base. I presumed that my chosen
solution will be easier to maintain.
I am not entirely happy with this choice and can see myself introducing
some plotting-related classes to encapsulate creating charts like these,
thus unmixing plotting logic from view logic. In the meantime this is a
working solution, and I plan to continue working on these charts in the
near future.
Allows computing a simple moving average lazily from a Stream, to be
used in plotting noisy data. Will be used in the daily burnt BSQ chart
under 'DAO -> Facts and Figures'. Can be easily modified to compute
other moving averages, like exponential.
This utility provides ways to zoom in a chart (more specifically its
axes) on inlier data points. The principal use-case is to restore
readability to charts that were distorted by outliers. The first (and
maybe the last) chart to use this is the daily burnt BSQ chart under
'DAO -> Facts and Figures'.
This provides an efficient way to calculate the standard deviation from
a DoubleStream, and is to be used in measuring whether or not a data
point on a chart axis is an inlier.
The Kahan summation algorithm is in a slightly different style, because
it's a faithful copy of its implementation in JDK 11's
DoubleSummaryStatistics.
The method formatAccountAge is replacing the string "1 days" for "1 day".
This is done to fix the plural for that case.
But it is also changing strings like "21 days" into "21 day".
After further testing, I realized I introduced a bug in commit
4f4b0f6ce9 because apparently the
ArrayList.contains() method does not properly work for
BlockChainExplorer object - to fix this I implemented a new
contains() method that uses string comparison instead
