I want to display data from a data frame where the index are dates. I want to have a tick per month. I want the ticks to be : -jan. -feb. ... -nov. -dec.
By default the ticks are : - jan. -march -may ... (does'nt display every month)
I have imposed a month format for the ticks and a 45 degrees rotation. I have try :
ax1.locator_params(nbins=12, axis='x')
That is supposed to make 12 ticks but noting is changing.