ticks at 0 and 2pi

Community matplotlib-users
1

Hello,

I'm trying to plot something from 0 to 2pi:

    fig = plt.figure()
    ax = fig.add_subplot(111)
    ax.set_title('Radial Magnetic Field')
    ax.set_ylabel(r'Poloidal Angle $\theta$')
    ax.set_xlabel(r'Toroidal Angle $\phi$')

    ax.set_xticks([0, 2 * math.pi])
    ax.set_xticklabels(['0', r'$2\pi$'])
    ax.set_yticklabels([r'$-\pi$', r'$\pi$'])
    ax.set_yticks([-math.pi, math.pi])

    ax.set_xlim(xmin=0, xmax=2 * math.pi)
    ax.set_ylim(ymin= -math.pi, ymax=math.pi)

But unfortunately the ticks for x=2pi and y=pi are not shown. They do
show up if I move them a tiny bit:

    ax.set_xticks([0, 2 * math.pi * 0.98])
    ax.set_yticks([-math.pi, math.pi * 0.98])
    But obviously this is ugly.

Is there a way to show the labels without moving the to the wrong
position and without extending the axis limits (since that introduces a
white border)?

Best,
       -Nikolaus

···

--
»Time flies like an arrow, fruit flies like a Banana.«

  PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C

2

I don't see the problem here, I get the ticks as specified. What
version of matplotlib are you using? What backend are you using?

Ryan

···

On Tue, Apr 20, 2010 at 8:58 AM, Nikolaus Rath <Nikolaus@...3072...> wrote:

Hello,

I'm trying to plot something from 0 to 2pi:

fig = plt.figure()
ax = fig.add_subplot(111)
ax.set_title('Radial Magnetic Field')
ax.set_ylabel(r'Poloidal Angle \\theta')
ax.set_xlabel(r'Toroidal Angle \\phi')

ax.set_xticks([0, 2 * math.pi])
ax.set_xticklabels(['0', r'2\\pi'])
ax.set_yticklabels([r'\-\\pi', r'\\pi'])
ax.set_yticks([-math.pi, math.pi])

ax.set_xlim(xmin=0, xmax=2 * math.pi)
ax.set_ylim(ymin= -math.pi, ymax=math.pi)

--
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma

3

Actually, now that I tried it again, it suddenly works. Strange... Sorry
for the pointless mail.

Best,

   -Nikolaus

···

On 04/20/2010 10:29 AM, Ryan May wrote:

On Tue, Apr 20, 2010 at 8:58 AM, Nikolaus Rath <Nikolaus@...3072...> wrote:

Hello,

I'm trying to plot something from 0 to 2pi:

   fig = plt.figure()
   ax = fig.add_subplot(111)
   ax.set_title('Radial Magnetic Field')
   ax.set_ylabel(r'Poloidal Angle \\theta')
   ax.set_xlabel(r'Toroidal Angle \\phi')

   ax.set_xticks([0, 2 * math.pi])
   ax.set_xticklabels(['0', r'2\\pi'])
   ax.set_yticklabels([r'\-\\pi', r'\\pi'])
   ax.set_yticks([-math.pi, math.pi])

   ax.set_xlim(xmin=0, xmax=2 * math.pi)
   ax.set_ylim(ymin= -math.pi, ymax=math.pi)

I don't see the problem here, I get the ticks as specified. What
version of matplotlib are you using? What backend are you using?

--
»Time flies like an arrow, fruit flies like a Banana.«

  PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C