Charts are a graphical representation of data, most often in the format of a graph or diagram. Use this tag for questions about using a charting library API.
A pie chart is a circular representation of data divided into sections by the drawing of radii.
If h is larger than your pie-chart radius you are placing your label outside the charts you should consider a constant r for that with a nice looking line
How to position label inside a pie chart slice
If you want to do a split slice operation on a pie charts first you need to create a pie charts with slices.here from what i understand you tried to give the option split charts first which actually is to make differrent pie charts in the same row or column which needs more than one pie-chart
Kibana 4 , making pie chart , error message