Example 42b: Tracks displayed in a colour scale

Plotting tracks where the trajectory is shown in colours mapped to a colour scale corresponding to the value of the underlying data by setting the legend_lines keyword to True

f = cf.read(f"cfplot_data/ff_trs_pos.nc")[0]

cfp.mapset(lonmin=-50, lonmax=50, latmin=20, latmax=80)
g = f.subspace(time=cf.wi(cf.dt("1979-12-01"), cf.dt("1979-12-10")))
g = g * 1e5
cfp.levs(0, 12, 1, extend="max")
cfp.cscale("scale1", below=0, above=13)
cfp.traj(
    g,
    legend_lines=True,
    linewidth=2,
    colorbar_title="Relative Vorticity (Hz) * 1e5",
)