Question about scale of vector plot

From: Will Cheng (wcheng AT unknown)
Date: Tue Nov 11 1997 - 15:38:10 MST


Hi there,

This may sound like a stupid question. I am using
VVECTR to plot cross-sectional vectors. The
vertical axis is in pressure (1000 to 100 hPa),
and the horizontal axis is in distance (0 to x km,
it varies).

The vertical component of the vector is in Pa/s,
while the horizontal component is in m/s.

I used the SET call to define the user and
real coordinates.

The problem is that I need to include a scale inset
for the vectors like:

              ^
    0.5 Pa/s |
              |_______>

                30 m/s

This, I can construct easily with another program.
The problem is knowing what the scales are. NCAR
graphics gives the magnitude of the maximum vector
in "mixed" units.

Of course, the appearence of the vectors
depends on the aspect ratio, but here the aspect
ratio is kind of meaningless since they're
in different coordinates.

If anybody has a solution, I appreciate your help.

Thanks in advance for your help.

        Will



This archive was generated by hypermail 2b29 : Wed Jun 28 2000 - 09:40:32 MDT