This avoids an artificial discontinuity where the angle wraps around
from -pi to +pi.
cut -d ' ' -f 1,2,3 final-vs-y0-E.data | $(PYTHON) ./plot_image.py --xyz -t 'Time vs impact parameter and energy' -o "$@"
angle-vs-y0-E.png: plot_image.py final-vs-y0-E.data
- cut -d ' ' -f 1,2,4 final-vs-y0-E.data | $(PYTHON) ./plot_image.py --xyz -t 'Angle vs impact parameter and energy' -o "$@"
+ cut -d ' ' -f 1,2,4 final-vs-y0-E.data | $(PYTHON) ./plot_image.py --xyz -t 'Angle vs impact parameter and energy' --color-map hsv -o "$@"
# Pattern rule for compiling object files from C++ source
# There is an implicit rule for this in GNU make