I finally solved it my self, after half a day of headbanging. This did the
trick for me, it is really good since it uses the values of the lower x
axis, so you do not have to go in fiddle with ticklabels etc, it also
changes values when you pan/zoom etc.
fig = pl.figure(1,figsize=(10.5,8))
fig.cl
I am trying to plot a spectrum, with lower x axis = velocity, on the upper =
frequency
The relationship between them (doppler formula) is
f = (1-v/c)*f_0
where f is the resulting frequency, v the velocity, c the speed of light,
and f_0 the frequency at v=0, ie. the v_lsr.
I have tried to solv
