这个程序使用箭袋/ QUIVER2生成vector field specialized plot and then customizes the arrows according to its length.

Just type
>> quiver2(U,V)
and that's it. You get
- customized arrows
- NaNs ignored and
- real (U,V) angles with respect to your print/screen.

To use only 7 colors use
>> quiver2(U,V,'c=',jet(7))
或your own colormap if you have my CMAPPING
>> quiver2(U,V,'c=','rygb')

To not normalize the length and draw all lines with the same length use:
>> quiver2(U,V,'n=',0,'w=',1)

To customize the arrows download ARROW by Erik Johnson here at the FileExchange and use:
>> quiver2(U,V,'a@','fancy')

Of course x,y,z may be used, as well as U,V,W and the S,'filled' normal options of QUIVER, besides of others '=' and '@' options as well.

To use it as FEATHER use
>> quiver2(U,V,'t=','feather')
或
>> quiver2(x,[],U,V)

Recommended to download also my CMAPPING and TLABEL for better use of this function.

Enjoy it!
Bugs reports and comments will be very appreciated!