Re: [Matplotlib-users] changing tick labels and tick positioning to account for origin

[Matthias M. <Mat...@gm...>]

Hi,

as nobody answered up to now I may make my (tiny) contribution.
 
On Friday 24 July 2009 22:58:10 per freem wrote:
> Hi all,
>
> i have a simple scatter plot, where the x axis and y axis are on different
> scales starting from 0. the x axis here ranges from 0 to 300 and the y axis
> from 0 to 1. i plot it as follows:
>
> my_fig = plt.figure(figsize=(6,5), dpi=100)
> x = rand(100)*300
> y = rand(100)
> plt.scatter(x, y)
> plt.rcParams['xtick.direction'] = 'out'
> plt.rcParams['ytick.direction'] = 'out'
> plt.xlim([-0.05, 300.05])
> plt.ylim([-0.05, 1.05])
> plt.show()
>
> i'd like to leave a bit of space between the origin and the x-axis 0 and
> between the origin and y-axis 0, which is why i added 0.05 to the end
> points of each axis. however, i'd like the space between 0 and the origin
> on either axis to be the same. since 0.05 on a scale from 0 to 300 is not
> the same amount of space as 0.05 on a scale from 0 to 1, this is not the
> effect i get. the yaxis looks good but the xaxis does not.  how can i fix
> this?

plt.xlim([-0.05*300, 300*1.05])
plt.ylim([-0.05, 1.05])

> second, how can i remove the upper x axis ticks and the right y axis ticks?
> these ticks are really not informative to the plot. ideally i would like to
> remove those axes altogether, and just have one x axis and one y axis --
> but i don't want to manually plot the axes. is there a way to do this?
>
> if that is not possible i'd like to at least remove those tick marks from
> the duplicate axes. any thoughts on this will be greatly appreciated.

Unfortunately I have no idea about this. Maybe someone else has an idea, if it 
is possible to remove the upper / right ticks.

best regards Matthias