[ncl-talk] "RasterFill" not plotting field

[Guido Cioni]

Hey Ryan, an out-of-memory error (I guess you are getting a segmentation fault, otherwise it may be more complicated to debug) can usually be resolved by increasing the memory that NCL reserves for drawing the contours. Have a look here http://www.ncl.ucar.edu/Document/Graphics/hlures.shtml <http://www.ncl.ucar.edu/Document/Graphics/hlures.shtml> (Increase the default (16mb) contour memory.).

However I don't understand why you are not getting the same result with RasterFill. You should just use this option and leave out the smoothing, which sometimes can be a problem (and slow things down considerably) if you have a lot of points...
 
Guido Cioni
http://guidocioni.altervista <http://guidocioni.altervista/>.org

> On 29 Dec 2016, at 21:36, Ryan Connelly <rconne01 at gmail.com> wrote:
> 
> Hi,
> 
> I'm running a rather computationally intensive NCL script that attempts to calculate and plot geostrophic MPV.  At times, it is (understandably) very very slow, and at other times I have encountered an error about workspace memory allocation being exceeded.  With regards to the latter, I read a suggestion to change from...
> 
>         opts_pv at cnFillOn                  = True
> 
> ...to...
> 
>         opts_pv at cnFillMode                = "RasterFill"
>     opts_pv at cnRasterSmoothingOn       = True
> 
> When doing so, the script executes much faster, but does not plot my desired field.  (I printed out test points to confirm that the values are within the range I tell it to plot in ContourParameters, so I know that is not the problem.)
> 
> Why might this be?
> 
> Thanks,
> Ryan
> 
> -- 
> Ryan Connelly
> M.S. Student in Atmospheric Sciences, Stony Brook University
> B.S. in Meteorology with Minors in Mathematics and GIS, Valparaiso University
> rconne01 at gmail.com <mailto:rconne01 at gmail.com>
> ryan.connelly at stonybrook.edu <mailto:ryan.connelly at stonybrook.edu>_______________________________________________
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