tick_left() and tick_right() with minor tick marks

Community matplotlib-users
1

Hi

I have a plot that has two different y-axis scales and I want
appropriate tick marks for the different y-axes. ie I want the tick
marks on the left axis to correspond to the scale on the left axis
etc... As far as I can tell the way to accomplish this, after
consulting the documentation, is to use the tick_left() and
tick_right() methods, I therefore have the following code:

axes1.yaxis.tick_left()
axes1.yaxis.set_major_locator(pylab.MultipleLocator(0.1))
axes1.yaxis.set_minor_locator(pylab.MultipleLocator(0.05))
axes2.yaxis.tick_right()
axes2.yaxis.set_major_locator(pylab.MultipleLocator(5))
axes2.yaxis.set_minor_locator(pylab.MultipleLocator(1))

but the minor ticks are on both the left and right y-axes. How can I
make the minor ticks for axes1 only appear on the the left and the
minor ticks for axes2 appear on the right?

Cheers

Adam

2

Hi

Anyone know how to fix this problem?

Cheers

Adam

···

On Thu, Jun 19, 2008 at 8:31 PM, Adam Mercer <ramercer@...287...> wrote:

Hi

I have a plot that has two different y-axis scales and I want
appropriate tick marks for the different y-axes. ie I want the tick
marks on the left axis to correspond to the scale on the left axis
etc... As far as I can tell the way to accomplish this, after
consulting the documentation, is to use the tick_left() and
tick_right() methods, I therefore have the following code:

axes1.yaxis.tick_left()
axes1.yaxis.set_major_locator(pylab.MultipleLocator(0.1))
axes1.yaxis.set_minor_locator(pylab.MultipleLocator(0.05))
axes2.yaxis.tick_right()
axes2.yaxis.set_major_locator(pylab.MultipleLocator(5))
axes2.yaxis.set_minor_locator(pylab.MultipleLocator(1))

but the minor ticks are on both the left and right y-axes. How can I
make the minor ticks for axes1 only appear on the the left and the
minor ticks for axes2 appear on the right?

Cheers

Adam

3

Wasn't this answered by the two_scales.py example?

···

On Monday 23 June 2008 20:53:56 Adam Mercer wrote:

Hi

Anyone know how to fix this problem?

Cheers

Adam

On Thu, Jun 19, 2008 at 8:31 PM, Adam Mercer <ramercer@...287...> wrote:
> Hi
>
> I have a plot that has two different y-axis scales and I want
> appropriate tick marks for the different y-axes. ie I want the tick
> marks on the left axis to correspond to the scale on the left axis
> etc... As far as I can tell the way to accomplish this, after
> consulting the documentation, is to use the tick_left() and
> tick_right() methods, I therefore have the following code:
>
> axes1.yaxis.tick_left()
> axes1.yaxis.set_major_locator(pylab.MultipleLocator(0.1))
> axes1.yaxis.set_minor_locator(pylab.MultipleLocator(0.05))
> axes2.yaxis.tick_right()
> axes2.yaxis.set_major_locator(pylab.MultipleLocator(5))
> axes2.yaxis.set_minor_locator(pylab.MultipleLocator(1))
>
> but the minor ticks are on both the left and right y-axes. How can I
> make the minor ticks for axes1 only appear on the the left and the
> minor ticks for axes2 appear on the right?
>
> Cheers
>
> Adam

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4

I don't see a problem here. I did the following:

ipython -pylab
run two_scales.py
ax1.yaxis.set_minor_locator(MultipleLocator(1000))
draw()
# Shows minor ticks on both left and right yaxis
ax1.yaxis.tick_left()
draw()
# shows minor ticks on left only
ax2.yaxis.set_minor_locator(MultipleLocator(.1))
draw()
# shows left yaxis minor ticks on left only, shows right yaxis ticks on both
ax2.yaxis.tick_right()
draw()
# shows left yaxis minor ticks on left only, right yaxis minor ticks on
# right only

Darren

···

On Monday 23 June 2008 08:53:56 pm Adam Mercer wrote:

Hi

Anyone know how to fix this problem?

Cheers

Adam

On Thu, Jun 19, 2008 at 8:31 PM, Adam Mercer <ramercer@...287...> wrote:
> Hi
>
> I have a plot that has two different y-axis scales and I want
> appropriate tick marks for the different y-axes. ie I want the tick
> marks on the left axis to correspond to the scale on the left axis
> etc... As far as I can tell the way to accomplish this, after
> consulting the documentation, is to use the tick_left() and
> tick_right() methods, I therefore have the following code:
>
> axes1.yaxis.tick_left()
> axes1.yaxis.set_major_locator(pylab.MultipleLocator(0.1))
> axes1.yaxis.set_minor_locator(pylab.MultipleLocator(0.05))
> axes2.yaxis.tick_right()
> axes2.yaxis.set_major_locator(pylab.MultipleLocator(5))
> axes2.yaxis.set_minor_locator(pylab.MultipleLocator(1))
>
> but the minor ticks are on both the left and right y-axes. How can I
> make the minor ticks for axes1 only appear on the the left and the
> minor ticks for axes2 appear on the right?

5

I don't see a problem here. I did the following:

ipython -pylab
run two_scales.py
ax1.yaxis.set_minor_locator(MultipleLocator(1000))
draw()
# Shows minor ticks on both left and right yaxis
ax1.yaxis.tick_left()
draw()
# shows minor ticks on left only
ax2.yaxis.set_minor_locator(MultipleLocator(.1))
draw()
# shows left yaxis minor ticks on left only, shows right yaxis ticks on both
ax2.yaxis.tick_right()
draw()
# shows left yaxis minor ticks on left only, right yaxis minor ticks on
# right only

Thanks Darren, that solves it. I was calling tick_left() and
tick_right() before calling set_{major,minor}_locator(). Moving these
calls to after the ticks have been set solves the problem.

Cheers

Adam

···

On Wed, Jun 25, 2008 at 7:21 AM, Darren Dale <dsdale24@...287...> wrote:

Darren