TRatioPlot: Comparing three or more histograms

Please provide the following information:


ROOT Version (6.10/04):
Platform, compiler (Scientific Linux CERN SLC release 6.9 (Carbon), gcc6.2):


Dear ROOT experts,

I wonder, is it possible to use TRatioPlot to compare three or more histograms together? I have no problem using TRatioPlot to compare two histograms but I have no idea how to compare three histograms (like h2/h1, h3/h1).

see Compare several histograms with TRatioPlot

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