[ncl-talk] Placing numbers above the bars

Rick Brownrigg brownrig at ucar.edu
Sun Feb 17 09:16:06 MST 2019


Hi Barry,

You might be able to use "datatondc()" to get the NDC coordinates of the
tops of the bars, and then use gsn_text_ndc() to draw your annotation
(applying a small offset in x and/or y direction to properly position it).
The example on the datatondc() does something similar, but with markers
rather than text.

    http://ncl.ucar.edu/Document/Functions/Built-in/datatondc.shtml
    http://ncl.ucar.edu/Document/Graphics/Interfaces/gsn_text_ndc.shtml

Hope that helps...
Rick
On Sat, Feb 16, 2019 at 11:05 PM Barry Lynn <barry.h.lynn at gmail.com> wrote:

> Hello:
>
> I have a bar chart attached.
>
> I would like to place a number (I will generate it) above the position of
> the bar highest bar, centered at each labeled (x-axis) interval.
>
> Is there a straightforward way to do this?
>
> Thanks,
>
> Barry
>
> --
> Barry H. Lynn, Ph.D
> Senior Associate Scientist, Lecturer,
> The Institute of the Earth Science,
> The Hebrew University of Jerusalem,
> Givat Ram, Jerusalem 91904, Israel
> Tel: 972 547 231 170
> Fax: (972)-25662581
>
> C.E.O, Weather It Is, LTD
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