===== UV coverage plot =====

It’s also possible to get at the actual visibilities in a UV data set. Here is a little script that uses matplotlib to make a UV coverage plot:

<code python>
from Wizardry.AIPSData import AIPSUVData
from AIPS import AIPS

from pylab import plot, show

AIPS.userno = 667

data = AIPSUVData('MULTI', 'UVDATA', 1, 3)
u = []
v = []
for visibility in data:
    u.append(visibility.uvw[0])
    v.append(visibility.uvw[1])

plot(u, v, '.')
show()
</code>