[ncl-talk] Printing the +- sign on a plot in NCL

[Dave Allured - NOAA Affiliate]

Tabish, NCL uses font tables for special symbols.
https://www.ncl.ucar.edu/Document/Graphics/font_tables.shtml

There are two different plus/minus signs in the math symbol tables.  I did
not look in the other tables.  Symbols are added to plot strings with the
documented encoding method.  Try this NCL example.  Change one line as
follows, to show the two different plus/minus symbols.
https://www.ncl.ucar.edu/Applications/Scripts/eqn_5.ncl

eqn2 = "Table 18 selector 'S' is :F18:S:F: symbol:C:" \
         + "Table 34 selector '1' is :F34:1:F: symbol"


On Mon, Sep 1, 2025 at 11:04 AM Tabish Ansari via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> Dear NCL folks,
>
> I'm posting here after a long time, partly because I've gotten better at
> using NCL over the years and partly because nowadays the AI LLMs are able
> to answer most of my queries on NCL and solve the errors. However, I
> finally have a question at which all the LLMs failed: How do I print the +-
> sign (+ on top of -) in an NCL plot? What's the appropriate function code
> to use inside the string?
>
> Thank you very much in advance!
>
> best regards,
> Tabish
>
> --------------------------------------------------------------------------------------
> Dr Tabish Ansari
> Research Associate
> Air Quality Modelling Group
> Research Institute for Sustainability (RIFS) - Helmholtz Centre Potsdam
> Potsdam, Germany
>
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