CircleGraph - Pit falls and caveats
Graph size
All graphical elements are scaled into the graph.
Thus it is easy to change graph size (e.g. from 1000x1000 to 4000x4000.
But: Fonts, markersizes, ... are given in pixel. Thus they will not change but the visual impression might be different.
Resolution and elements
A graph with size 2000x2000 pixel can contain a band with a maximum of
~6300 pixel on the perimeter.
When e.g. trying to display human genome based data (~3 Giga Bases in size), a single pixel
on the largest ring would cover ~0.5 Mega Bases.
Thus it would not make any sense to supply full resolution data at BP level.
E.g. Methylation levels of single CpG-sites wihtin a genes promoter regions (~1500 bp).
Such data could not be visually resolved, but would slow down any visulaization and
even might crash the program due to immense data.
Therfore it is highly recommended to reduce/bin data to a meaningful range.
- i.e. less than 6300 features at the largest band
- less than 3000 features at a band with half the diameter of the graph
- ...