Dear NCL,
Will helped me on this issue, but I still did not get the result as I
expected.
What I need is to shade the region below the XYBarchart outline that is
less than zero (value) indicating by xRefLine.
However, I have'nt got any trick, The example of the figure is in the
attachment.
I fully understand what Willi suggested by overlaying the histogram, but I
prefer to
have only the outline chart rather that the bar. Any helps would be really
appreciated.
Thanks for any tricks.
Best
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