Re: making dots in pattern 17 smaller

I tried adjusting the limits in NGDOTS, without apparent effect. The
dots in the coneff_10.ncl are already so fine, I think we've reached a
fundamental limit as to size vs. visibility. None of this explains
why the dots in Mark's example are relatively large. Mark -- I'd be
happy to take a look at your script, if you care to send it.

RB

On Mon, 1 Oct 2012 15:00:25 -0600
  David Brown <dbrown@ucar.edu> wrote:
> I just examined the NGDOTS code (which is used to actually draw each
>dot for fill pattern 17) and found 1) that even though, as Rick
>noted, the minimum value that can be specified for fill dot size is
>0.0001, in fact it looks like NGDOTS does not permit a size less than
>0.001. The limitation appears designed to prevent the dots from
>becoming so small that some of them disappear completely. I agree
>with Rick that Mark's dots look bigger that what is possible even
>with these limitations in NCL. But perhaps it is worth experimenting
>with adjusting the limits in NGDOTS.
> -dave
>
>
> On Oct 1, 2012, at 2:07 PM, Rick Brownrigg wrote:
>
>> Hi Mark, Adam,
>>
>> There appears to be an internal limit of 0.0001. However, I set it
>>to a smaller value and it did not have any effect, so I suspect
>>there's other limits coming in to play.
>>
>> Mark, I'm surprised at how large the dots are in your plot; example
>>10 in the link achieves much finer dots, and illustrates different
>>spacings.
>>
>> http://www.ncl.ucar.edu/Applications/coneff.shtml
>>
>> I don't know what else to suggest at this point…
>> Rick
>>
>> On Oct 1, 2012, at 11:57 AM, Adam Phillips wrote:
>>
>>> Hi Mark,
>>> I'm seeing the same thing you are seeing with respect to the dot
>>>sizes. I typically use a value of .0015 or .0020, but changed it to
>>>.0002 and I don't believe it got any smaller. I was able to easily
>>> change the density though with cnFillScaleF. (~0.5 gets them
>>>quite close to one another for a panel plot of mine.)
>>>
>>> A NCL developer will have to chime in on where the minimum value of
>>>cnFillDotSizeF is (assuming we are correct), and if there is a way
>>>around it.. Best regards, Adam
>>>
>>> On 09/30/2012 10:56 PM, mark collier wrote:
>>>> Hi,
>>>> I've managed to make the dots smaller (pattern 17) using the
>>>>cnFillDotSizeF resource but only to a limit. I can change the density
>>>>of the dots with cnFillScaleF. However, it is still not optimum, I
>>>>would like to create smaller dots and have them closer together - is
>>>>this possible? There seems to be a limit do the dot size reduction,
>>>>although less so with the density.
>>>>
>>>> Can a new pattern be created to achieve this?
>>>>
>>>> I've attached a figure where I want to make this improvement. I am
>>>>using these resources with gsn_csm_contour and gsn_contour_shade.
>>>>
>>>> Regards,
>>>> Mark.
>>>>
>>>> <Mail Attachment.jpeg>
>>>>
>>>>
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>>> --
>>> ______________________________________________________________
>>> Adam Phillips asphilli@ucar.edu
>>> NCAR/Climate and Global Dynamics Division (303) 497-1726
>>> P.O. Box 3000
>>> Boulder, CO 80307-3000 http://www.cgd.ucar.edu/cas/asphilli
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Received on Tue Oct 2 03:35:31 2012