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Vector Size

Question:

Can I put an upper limit on vector sizes in Ferret?

Example:

> In order to see what is going on in the regions of low
> wind speed I have to have vector lengths that are fairly
> small. This causes me to get very large vectors elsewhere.

Solution:

Here's one example which generates the figure above and then fixes it by plotting large wind speeds as smaller vectors in bold. (It looks better on a larger scale plot.)

set data monthly_navy_winds
set region/x=100w:20w/y=80s:20s
vector/aspect/l=1/len=5/pen=1/nolab uwnd,vwnd
go fland 20
vector/aspect/l=1/len=5/pen=1/over/nolab uwnd,vwnd
!
! Now the fix
!
set win/clear
let wspd = (uwnd^2+vwnd^2)^0.5
let hi_threshhold = IF wspd gt 5 then 1
let lo_threshhold = IF wspd le 5 then 1
vector/aspect/l=1/len=5/pen=1/nolab lo_threshhold*uwnd,vwnd
go fland 20
vector/aspect/l=1/len=5/pen=1/over/nolab lo_threshhold*uwnd,vwnd
vector/aspect/l=1/len=20/pen=13/overlay/nolab hi_threshhold*uwnd,vwnd