[ncl-talk] circular polymarker woes
Matt Flournoy
mflournoy37 at gmail.com
Tue Aug 1 09:24:07 MDT 2017
Thank you, Mary! That index looks great.
Best,
Matt
On Mon, Jul 31, 2017 at 4:59 PM, Mary Haley <haley at ucar.edu> wrote:
> Hi Matt,
>
> Instead of using index 4 in the marker table, you can create your own
> marker using any one of our font tables. Some of these were drawn with
> higher resolution.
>
> For example, click over to our font tables page:
>
> http://www.ncl.ucar.edu/Document/Graphics/font_tables.shtml
>
> and click on font table 37:
>
> http://www.ncl.ucar.edu/Document/Graphics/Images/font37.png
>
> Letter R is a hollow circle that might work for you.
>
> To use it, call:
>
> icirc = NhlNewMarker(wks,"R",37,0.,0.,1.,1.,0.)
>
> and then use that as your marker index:
>
> gsres at gsMarkerIndex = icirc
> See the attached script, which displays the two types of circles
> side-by-side.
>
> Font table 19 also has some hollow circles you can try.
>
> --Mary
>
>
> On Mon, Jul 31, 2017 at 9:56 AM, Matt Flournoy <mflournoy37 at gmail.com>
> wrote:
>
>> Hi all,
>>
>> I'm having a minor problem plotting a circular polymarker. I'm using
>> index=4 for the marker index, which should be a hollow circle, but when I
>> plot it larger than ~ 0.03 the shape starts to deteriorate into a 16-sided
>> polygon. Is there a way to ensure that the circular marker retains its
>> shape when it is plotted larger than normal? I've attached a .png of the
>> figure I'm trying to create, and here is the snippet of code that deals
>> with the portion of the plot that I'm having problems with:
>>
>> *******************
>>
>> ;-------
>> ; Create the index for the hollow, circle marker.
>> ;-------
>>
>> ; mstring = "x" ; <-- default for hollow circle
>> ; fontnum = 19
>> ; xoffset = 0.0
>> ; yoffset = 0.075
>> ; ratio = 1.3125
>> ; size = 1.2
>> ; angle = 0.0
>> ;
>> ; new_index = NhlNewMarker(xwks, mstring, fontnum, xoffset, yoffset,
>> ratio, size, angle)
>>
>> cn1_x = 0.84
>> cn1_y = 0.20
>>
>> text_cn1 = "0.01"
>>
>> cn_res1 = True
>> cn_res1 at gsMarkerColor = cn_color
>> cn_res1 at gsLineColor = cn_color
>> cn_res1 at gsMarkerIndex = 4 ; <-- open circle
>> cn_res1 at gsMarkerSizeF = 0.10
>> cn_res1 at gsLineThicknessF = 3
>> cn_res1 at gsMarkerThicknessF = 3
>> cn_res1 at gsFontQuality = "High"
>>
>> cn_res1_text = True
>> cn_res1_text at txFontHeightF = 0.008
>> cn_res1_text at txFontColor = cn_color
>> cn_res1_text at txBackgroundFillColor = "white"
>>
>> gsn_polymarker_ndc(xwks,cn1_x,cn1_y,cn_res1)
>> gsn_text_ndc (xwks,text_cn1,cn1_x + (cn_res1 at gsMarkerSizeF/2),cn1_
>> y,cn_res1_text)
>>
>> ;-------
>>
>> offset = 0.03
>>
>> cn2_x = cn1_x - offset + 0.02
>> cn2_y = cn1_y
>>
>> text_cn2 = "0.02"
>>
>> cn_res2 = True
>> cn_res2 at gsMarkerColor = cn_color
>> cn_res2 at gsLineColor = cn_color
>> cn_res2 at gsMarkerIndex = 4 ; <-- open circle
>> cn_res2 at gsMarkerSizeF = cn_res1 at gsMarkerSizeF - offset
>> cn_res2 at gsLineThicknessF = 3
>> cn_res2 at gsMarkerThicknessF = 3
>> cn_res2 at gsFontQuality = "High"
>>
>> cn_res2_text = True
>> cn_res2_text at txFontHeightF = cn_res1_text at txFontHeightF
>> cn_res2_text at txFontColor = cn_color
>> cn_res2_text at txBackgroundFillColor = "white"
>>
>> gsn_polymarker_ndc(xwks,cn2_x,cn2_y,cn_res2)
>> gsn_text_ndc (xwks,text_cn2,cn2_x + (cn_res2 at gsMarkerSizeF/2),cn2_
>> y,cn_res2_text)
>>
>> ;-------
>>
>> cn3_x = cn2_x - offset + 0.02
>> cn3_y = cn2_y
>>
>> text_cn3 = "0.03"
>>
>> cn_res3 = True
>> cn_res3 at gsMarkerColor = cn_color
>> cn_res3 at gsLineColor = cn_color
>> cn_res3 at gsMarkerIndex = 4 ; <-- open circle
>> cn_res3 at gsMarkerSizeF = cn_res2 at gsMarkerSizeF - offset
>> cn_res3 at gsLineThicknessF = 3
>> cn_res3 at gsMarkerThicknessF = 3
>> cn_res3 at gsFontQuality = "High"
>>
>> cn_res3_text = True
>> cn_res3_text at txFontHeightF = cn_res1_text at txFontHeightF
>> cn_res3_text at txFontColor = cn_color
>> cn_res3_text at txBackgroundFillColor = "white"
>>
>> gsn_polymarker_ndc(xwks,cn3_x,cn3_y,cn_res3)
>> gsn_text_ndc (xwks,text_cn3,cn3_x + (cn_res3 at gsMarkerSizeF/2),cn3_
>> y,cn_res3_text)
>>
>> ;------- and lastly, the units text inside the circles...
>>
>> cn4_x = 0.815
>> cn4_y = cn3_y
>>
>> text_cn4 = "s~S~-1~N~"
>>
>> cn_res4_text = True
>> cn_res4_text at txFontHeightF = cn_res1_text at txFontHeightF
>> cn_res4_text at txFontColor = cn_color
>> cn_res4_text at txBackgroundFillColor = -1 ; <-- transparent
>>
>> gsn_text_ndc (xwks,text_cn4,cn4_x,cn4_y,cn_res4_text)
>>
>> *******************
>>
>> Please let me know if I can provide any more info to help with this.
>>
>> Thanks,
>> Matt
>>
>> [image: Inline image 2]
>> --
>> Matthew Flournoy
>> M.S. Meteorology, University of Oklahoma
>> B.S. Meteorology, Penn State University
>>
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>>
>
--
Matthew Flournoy
M.S. Meteorology, University of Oklahoma
B.S. Meteorology, Penn State University
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