[LON-CAPA-users] Displaying a graph with rational multiples of pi on the x-axis

Seema Ali sali at vsb.bc.ca
Mon Dec 12 18:20:24 EST 2011

Is it possible to display the x-axis as fractions of pi?  For example:
-2pi, -3/2 pi, -pi, -1/2 pi, 0, 1/2 pi, pi, 3/2pi, 2pi  OR
-2pi, -3pi/2, -pi, -pi/2, 0, pi/2, pi, 3pi/2, 2pi
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