I thought the definition of a vector was length and direction, so GRadar lines gave direction and strength by virtue of their angle and length.

That seems to be a classic definition for me. If you want to change that to include time, what resolution do you want to achieve? If it is in 4 or 6 segments by day, perhaps you could start the vector at some position offset from the centre of the plot. One might see something lovely like a swirl as the day progressed and the wind shifted gradually around the face; strengthening and abating.

Kind regards

David

-----Original Message----- From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU]On Behalf Of firepit Sent: Thursday, 12 July 2007 1:00 AM To: SAS-L@LISTSERV.UGA.EDU Subject: help with windrose and incorporation of other data

I have data (value, time) that I have graphed using proc gplot, and wind data (speed, direction) that I used proc gradar to graph a very messy "windrose." Any suggestions for a better way to plot a windrose? Also, a way to incorporate the concetration and wind direction/speed by time?

I saw the SUGI paper on creating a windrose plot using %SLICE and %DRAW, but I am having a hard time following it...