Re: [ferret_users] Gray and black wind vectors

["William S. Kessler" <william.s.kessler@xxxxxxxx>]

First do all the vectors in gray, then do the significant ones in black:

! choose an unused color, make it gray
ppl color,6,50,50,50     ! medium gray
! plot all the vectors
vector/col=6 uvec,vvec

! define new vector grids for just the significant ones
let uvecsig=if uvec [is significant] then uvec
let vvecsig=if vvec [is significant] then vvec
! overplot just the significant ones in black
! note /len (without arguments) gives the same scale as the previous vector command
vector/over/col=1/len uvecsig,vvecsig

On Aug 24, 2013, at 2:19 PM, Fisseha Berhane wrote:

> Hello dear all,
> 
> I have composites of wind and I want to use black to those composites which are significant at the 95% confidence level and gray for the rest, as in the attached figure. Is this possible to handle in Ferret?
> 
> Thank you,
> Fisseha
> <wind.GIF>