Re: making dots in pattern 17 smaller

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
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Received on Mon Oct 1 23:00:42 2012