Re: overlay contour (netto)

I have installed NCL v.6.1.2
and it works perfect !! Thank you

On Sat, Aug 10, 2013 at 9:22 AM, Xi Chang <xi.chang01@gmail.com> wrote:

> It's great. But is there any way to implement this in NCL v.6.0.0 or 6.1.2
> instead of next release 6.2 ?
> I implemented this code but I produced different color, not like what I
> was expecting before.
>
>
> On Sat, Aug 10, 2013 at 11:04 AM, Mary Haley <haley@ucar.edu> wrote:
>
>>
>> On Aug 9, 2013, at 1:01 PM, Xi Chang wrote:
>>
>> Hallo NCL,
>>
>> Thanks for the idea, However I just wonder
>> 1. how can I possibly change the color, for instance from black to be
>> *SlateBlue"? and
>>
>>
>> You will still have to use RGBA triplets in order to get the
>> transparency, but first, you can see our list of named colors at:
>>
>> http://www.ncl.ucar.edu/Document/Graphics/named_colors.shtml
>>
>> Or the actual RGB values at:
>>
>> http://www.ncl.ucar.edu/Applications/Scripts/rgb.txt
>>
>> You'll see there's a color called "slate blue". You can then use the
>> function "named2gba" to return the RGBA triplet for "slate blue".
>>
>> I've updated the "newcolor_17.ncl" example to include this new function
>> (which will be in V6.2.0) and the "slate blue" color.
>>
>> http://www.ncl.ucar.edu/Applications/Scripts/newcolor_17.ncl
>>
>> 2. is it possible to overlay this netto contour with another contour line?
>>
>>
>> To overlay another contour line, you can use the same the same "overlay"
>> procedure that's used in this example, except create a line contour plot
>> instead of a filled plot:
>>
>> ;---Set some plot options
>> lres = True
>>
>> lres@gsnDraw = False ; Don't draw plots or advance
>> lres@gsnFrame = False ; frame (need to overlay later)
>>
>> lres@cnInfoLabelOn = False ; Turn off info label
>> lres@cnLineColor = "limegreen" ; default is foreground
>> (usually black)
>>
>> lres@cnLineThicknessF = 3.0
>> lres@cnLineDrawOrder = "PostDraw"
>>
>> line_contour = gsn_csm_contour(wks,x,lres)
>> overlay(ovly_plot1, line_contour)
>>
>>
>> Thank you
>>
>>
>> On Fri, Jul 26, 2013 at 1:15 AM, Mary Haley <haley@ucar.edu> wrote:
>> Xi,
>>
>> See the attached example and image. Is this what you need? I draw the
>> contour lines in different colors so you could see them in the final
>> overlay plot.
>>
>> What I did was to set cnFillColors for both plots, using RGBA
>> quadruplets. This allows me to set the transparency levels for each color.
>>
>> For the first plot, I made both contour fill colors (black and white)
>> fully opaque (non-transparent).
>>
>> For the second plot, I made black fully opaque, and white fully
>> transparent.This way, when you overlay, you will only see white if both
>> contour areas are white in the same locations.
>>
>> --Mary
>>
>>
>> On Jul 24, 2013, at 3:24 AM, Xi Chang wrote:
>>
>> >
>> > Hallo NCL,
>> >
>> > I have a question, how can i possibly create such an overlay contour
>> from two different fields, let's say:
>> >
>> > X (contour: negative value= black, positive value= white)
>> > Y (contour: negative value= black, positive value= white)
>> >
>> > then do an "OVERLAY X slice Y". The result of overlay product from two
>> contour map will be:
>> >
>> > if negative values + negative values == Black
>> > if positive + negative == Black
>> > if negative + positive == Black
>> > if positive + positive === "WHITE"
>> >
>> > X slice Y.
>> >
>> > I really appreciate for your hints.
>> >
>> > Xi
>> > _______________________________________________
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>>
>>
>>
>>
>>
>

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Received on Mon Aug 12 07:03:13 2013