[ncl-talk] Error bars

[Guilherme Martins]

Hi Mary,

Thanks for the explanation.

Guilherme.



2014-07-24 12:05 GMT-03:00 Mary Haley <haley at ucar.edu>:

> Hi Guilherme,
>
> Sorry about the delay in response.  The issue is simply that you need to
> make sure that when you call gsn_add_polyxxxx, the variable on the left
> side of the "=" is unique every time.
>
> Usually when you see this type of error:
>
> warning:TransformPreDraw: tfPolyDrawList element 127 is invalid
>
> it has to do with the variable not being unique.
>
> You almost had it, as you defined "error_bars" and "centers" as "id"
> arrays.  But, these are defined inside of a larger loop across "i", and so
> every time you go through another iteration of "i", the old error_bars and
> centers ids were getting clobbered and reset.
>
> One way around this is to not predefine any arrays at all, and instead
> just create a dummy attribute that you can attach to "plot", and make sure
> this dummy attribute has a unique name every time.  Here's one way to do
> that:
>
>     tmp_str = "centers" + i*10 + t   ; give attr a unique name
>     plot@$tmp_str$   =
> gsn_add_polymarker(wks,plot(0,0),t,pin_n(t),polyres)
>     tmp_str = "error_bar" + i*10 + t
>     plot@$tmp_str$ =
> gsn_add_polyline(wks,plot(0,0),(/t,t/),(/pin_n(t)+stddev(p
> in_n),pin_n(t)-stddev(pin_n)/),polyres)
>
> --Mary
>
>
>
> On Mon, Jul 21, 2014 at 11:52 AM, Guilherme Martins <jgmsantos at gmail.com>
> wrote:
>
>> Hi all,
>>
>> I'm trying to plot the error bars following the example:
>>
>> http://www.ncl.ucar.edu/Applications/Scripts/xy_13.ncl
>>
>> The bars are ok, but I have the error:
>>
>> fatal:Number of dimensions in parameter (0) of (NhlAddPrimitive) is (2),
>> (1) dimensions were expected
>>
>> When insert the error bars.
>>
>> I'm using NCL 6.2.0. My files are in attached.
>>
>> Guilherme.
>>
>> --
>> https://sites.google.com/site/jgmsantos/
>>
>>
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>


-- 
https://sites.google.com/site/jgmsantos/
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