Module(s): CASA Task sdplot() need modification to enable
qt4Agg backend
Description:
Qt4Agg backend is now available for TOOL-based plotting with ASAP plotter.
You need to (1) have PyQt4 (compiled with the proper python) installed,
(2) set backend as Qt4Agg in matplotlibrc and (3) import asaplotgui
from asap.asaplotgui_qt4 in asapplotter._newplotter() in order to
make Qt4Agg backend available.
NOTICE sdplot() task in CASA is currently assuming TkAgg backend and doesn't
work with Qt4Agg backend.