Re: switching spline interpolation for Hovmoeller?

From: Mary Haley <haley_at_nyahnyahspammersnyahnyah>
Date: Tue Apr 23 2013 - 12:28:31 MDT

Hi Kristina,

It's likely that you need to convert your time values to another format. If you have really large values, and then you try to use them as coordinates on an axis, NCL may have trouble trying to align them properly on the axis. I usually tell people to ignore the suggestion about adjusting "trYTensionF", and instead try rescaling their axis values if possible.

I don't know what your time values look like, but look at the "cd_convert" function for converting them to different units.

See the second example at:

It shows how you can use this function to replace your existing time coordinate array.


On Apr 23, 2013, at 9:26 AM, Kristina Fröhlich wrote:

> Hello,
> is there a possibility to switch off the interpolation in a Hovmoeller plot? Since I catted together several forecasts I cause jumps in the timeseries and NCL is complaining about the spline approximation (at least for the model data):
> warning:_NhlCreateSplineCoordApprox: Attempt to create spline approximation for Y axis failed: consider adjusting trYTensionF value
> warning:IrTransInitialize: error creating spline approximation for trYCoordPoints; defaulting to linear
> I tried to change the tension value but without any effect. However, I would prefer not to have any spline in order not to fake a smooth transition where there is no one (see attached figure). But I found no example how to do this...
> Any ideas around?
> Thanks in advance, Kristina
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Received on Tue Apr 23 12:28:40 2013

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