Re: NCL API

Hi Oliver,

You should be able to plot it directly.

Using C code is going to be quite different than NCL code. The interface for creating graphics looks a
bit different.

You can see an example where dummy data is created directly in an HLU C program:

http://www.ncl.ucar.edu/Applications/BasicExamples/Contour/cn02.shtml

Scroll down and click on "cn02c.c" to see what it looks like.

The code that passes the dummy array to the plotting code is this:

    NhlRLClear(srlist);
    len_dims[0] = N;
    len_dims[1] = M;
    NhlRLSetMDFloatArray(srlist,NhlNsfDataArray,T,2,len_dims);

Resources are set with calls to NhlRLSetXXXXX where XXXXX is the data type (Integer, Float, String, etc).
If you are setting a resource that is a 1D array, then you need to use the NhlRLSetXXXXXArray one. If you
are setting resource that requires an nD array, use NhlRLSetMDXXXXXArray

Finally, you can compile your C program with:

    nhlcc -o yourprogram yourprogram.c

Hope this helps.

--Mary

On Aug 23, 2010, at 2:08 AM, <Oliver.Fuhrer@meteoswiss.ch> <Oliver.Fuhrer@meteoswiss.ch> wrote:

> Hi NCL Team,
>
> I was just looking over the NCL API documentation and have a question.
> Say I have a C program that generates a 2d field that I would like to
> plot. Is it possible to plot this field _directly_ using the NCL API
> from my C program or do I have to write a NetCDF (or any other) file and
> send a NCL script which opens the file, reads the data and plots the
> field over the NCL API (as in the example provided on the NCL API
> documentation)?
>
> Kind regards,
> Oli
>
> ________________________________________
>
> Oliver Fuhrer
> Numerical Models
>
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>
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Received on Mon Aug 23 11:13:52 2010