[ncl-talk] Questions on overlay Vector Plot (Legend, XAxis and CurlyVector Density)

LSL lslrsgis at whu.edu.cn
Mon Sep 28 19:00:41 MDT 2020


Thanks for the useful advise and link:) It is helpful to learn 
additional control on vectors.

LSL

On 2020/9/29 上午1:52, Dave Allured - NOAA Affiliate wrote:
> You can also thin vectors by subsampling or "striding" the data grid.  
> I have used this method with good results.  This is somewhat different 
> than the effect with vcMinDistanceF.  The subsampling method gives 
> explicit control over which rows and columns are plotted.  See and 
> compare both methods in example 4 on the Vector Effects page:
> https://www.ncl.ucar.edu/Applications/veceff.shtml
>
>
> On Mon, Sep 28, 2020 at 11:28 AM Adam Phillips via ncl-talk 
> <ncl-talk at mailman.ucar.edu <mailto:ncl-talk at mailman.ucar.edu>> wrote:
>
>     Hello,
>     1) Set vcRefAnnoString2 = "Vector" or ""
>     http://www.ncl.ucar.edu/Document/Graphics/Resources/vc.shtml#vcRefAnnoString2
>
>     2) tiXAxisOffsetYF = 0.05   ; you will likely have to try
>     different settings to get the exact positioning you want
>     http://www.ncl.ucar.edu/Document/Graphics/Resources/ti.shtml#tiXAxisOffsetYF
>
>     3) The best option is usually to set vcMinDistanceF. See example
>     #3 here:
>     http://www.ncl.ucar.edu/Applications/vector.shtml#ex3
>     http://www.ncl.ucar.edu/Document/Graphics/Resources/vc.shtml#vcMinDistanceF
>
>     Hope that helps!
>     Adam
>
>
>     On Mon, Sep 28, 2020 at 6:24 AM LSL via ncl-talk
>     <ncl-talk at mailman.ucar.edu <mailto:ncl-talk at mailman.ucar.edu>> wrote:
>
>         Dear NCL community,
>
>         Three questions for a overlay(contour, vector) plot:
>
>         (1) How to make "Reference Vector" in legend's upperright side as
>         "Vector" or nothing?
>
>         (2) How to make Longitude (X axis title) higher than colorbar
>         of contour
>         T2?
>
>         (3) How to make the CurlyVector less dense?
>
>         Thanks in advance,
>
>         LSL
>

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