matplotlib-users Mailing List for matplotlib

On Tue, Sep 17, 2013 at 11:55 AM, Chad Kidder <cck...@gm...> wrote:
> I'm following the MPL Qt4 example given at
> http://matplotlib.org/examples/user_interfaces/embedding_in_qt4.html and
> it looks like I am timing out somewhere in the setup. The error I am
> getting is:
>
> RuntimeError: super-class __init__() of type MyDynamicMplCanvas was never
> called
>
> It's timing out on a function that goes and talks to a piece of test
> equipment to get some data to plot. That function takes on the order of a
> second to complete and is located in compute_initial_figure(self): for the
> previously mentioned class. I will need to make these calls whenever I go
> into the update routine and they may take a few seconds to update.
>
> First, where is the "timeout" that I am violating? Second, how do I fix
> this? Thanks for your help.
>
>
> --Chad Kidder
>
>
Hi Chad,
I think the timeout is right over here:
class MyDynamicMplCanvas(MyMplCanvas):
 """A canvas that updates itself every second with a new plot."""
 def __init__(self, *args, **kwargs):
 MyMplCanvas.__init__(self, *args, **kwargs)
 timer = QtCore.QTimer(self)
 QtCore.QObject.connect(timer, QtCore.SIGNAL("timeout()"),
self.update_figure)
 timer.start(1000)
My suspicion would be to either bump up that timer to take more than a
second, or come up with a different signal function to more intelligently
handle refreshes.
Cheers!
Ben Root

I'm following the MPL Qt4 example given at
http://matplotlib.org/examples/user_interfaces/embedding_in_qt4.html and it
looks like I am timing out somewhere in the setup. The error I am getting
is:
RuntimeError: super-class __init__() of type MyDynamicMplCanvas was never
called
It's timing out on a function that goes and talks to a piece of test
equipment to get some data to plot. That function takes on the order of a
second to complete and is located in compute_initial_figure(self): for the
previously mentioned class. I will need to make these calls whenever I go
into the update routine and they may take a few seconds to update.
First, where is the "timeout" that I am violating? Second, how do I fix
this? Thanks for your help.
 --Chad Kidder

Hi Ben,
It works for me. Thank you very much !
Best wishes
 Nils
On Tue, Sep 17, 2013 at 3:25 PM, Benjamin Root <ben...@ou...> wrote:
>
>
>
> On Tue, Sep 17, 2013 at 4:25 AM, Nils Wagner <ni...@go...>wrote:
>
>> Hi all,
>>
>> How can I modify the grid linewidth and grid line color of an Axes3D
>> object ?
>> is it possible to use white instead of gray for the background color ?
>>
>> The following snippet doesn't show the desired effect.
>>
>> from mpl_toolkits.mplot3d import Axes3D
>> import matplotlib.pyplot as plt
>> fig = plt.figure(figsize=(10,8))
>> ax = fig.gca(projection='3d')
>> ax.grid(color='r',linestyle='-',linewdith=2)
>>
>>
> A (somewhat) undocumented feature (and is not guaranteed to work in the
> future!) is the axis's _axinfo dictionary.
>
> # This is a temporary member variable.
> # Do not depend on this existing in future releases!
> self._axinfo = self._AXINFO[adir].copy()
> self._axinfo.update({'label' : {'space_factor': 1.6,
> 'va': 'center',
> 'ha': 'center'},
> 'tick' : {'inward_factor': 0.2,
> 'outward_factor': 0.1},
> 'ticklabel': {'space_factor': 0.7},
> 'axisline': {'linewidth': 0.75,
> 'color': (0, 0, 0, 1)},
> 'grid' : {'color': (0.9, 0.9, 0.9, 1),
> 'linewidth': 1.0},
> })
>
> where _AXINFO is a class-level attribute defined as:
> # Some properties for the axes
> _AXINFO = {
> 'x': {'i': 0, 'tickdir': 1, 'juggled': (1, 0, 2),
> 'color': (0.95, 0.95, 0.95, 0.5)},
> 'y': {'i': 1, 'tickdir': 0, 'juggled': (0, 1, 2),
> 'color': (0.90, 0.90, 0.90, 0.5)},
> 'z': {'i': 2, 'tickdir': 0, 'juggled': (0, 2, 1),
> 'color': (0.925, 0.925, 0.925, 0.5)},
> }
>
> This information used to be hard-coded throughout the axis3d.py module. I
> consolidated it all into this dictionary for each Axis3D instance. So, you
> should be able to create your Axes3D object, and then do something like the
> following:
>
> ax = fig.gca(projection='3d')
> ax.xaxis._axinfo['grid'].update({'color': 'r', 'linewidth': 2})
> ax.xaxis._axinfo['color'] = 'white'
>
> (Note: untested code!) I don't think the linestyle can be specified,
> though. At some point, I probably should get the Axes3D.grid() function
> defined to mess around with this _axinfo modify the _axinfo dictionary.
>
> I hope that helps!
> Ben Root
>

On Tue, Sep 17, 2013 at 4:25 AM, Nils Wagner <ni...@go...> wrote:
> Hi all,
>
> How can I modify the grid linewidth and grid line color of an Axes3D
> object ?
> is it possible to use white instead of gray for the background color ?
>
> The following snippet doesn't show the desired effect.
>
> from mpl_toolkits.mplot3d import Axes3D
> import matplotlib.pyplot as plt
> fig = plt.figure(figsize=(10,8))
> ax = fig.gca(projection='3d')
> ax.grid(color='r',linestyle='-',linewdith=2)
>
>
A (somewhat) undocumented feature (and is not guaranteed to work in the
future!) is the axis's _axinfo dictionary.
 # This is a temporary member variable.
 # Do not depend on this existing in future releases!
 self._axinfo = self._AXINFO[adir].copy()
 self._axinfo.update({'label' : {'space_factor': 1.6,
 'va': 'center',
 'ha': 'center'},
 'tick' : {'inward_factor': 0.2,
 'outward_factor': 0.1},
 'ticklabel': {'space_factor': 0.7},
 'axisline': {'linewidth': 0.75,
 'color': (0, 0, 0, 1)},
 'grid' : {'color': (0.9, 0.9, 0.9, 1),
 'linewidth': 1.0},
 })
where _AXINFO is a class-level attribute defined as:
 # Some properties for the axes
 _AXINFO = {
 'x': {'i': 0, 'tickdir': 1, 'juggled': (1, 0, 2),
 'color': (0.95, 0.95, 0.95, 0.5)},
 'y': {'i': 1, 'tickdir': 0, 'juggled': (0, 1, 2),
 'color': (0.90, 0.90, 0.90, 0.5)},
 'z': {'i': 2, 'tickdir': 0, 'juggled': (0, 2, 1),
 'color': (0.925, 0.925, 0.925, 0.5)},
 }
This information used to be hard-coded throughout the axis3d.py module. I
consolidated it all into this dictionary for each Axis3D instance. So, you
should be able to create your Axes3D object, and then do something like the
following:
ax = fig.gca(projection='3d')
ax.xaxis._axinfo['grid'].update({'color': 'r', 'linewidth': 2})
ax.xaxis._axinfo['color'] = 'white'
(Note: untested code!) I don't think the linestyle can be specified,
though. At some point, I probably should get the Axes3D.grid() function
defined to mess around with this _axinfo modify the _axinfo dictionary.
I hope that helps!
Ben Root

Hi all,
How can I modify the grid linewidth and grid line color of an Axes3D object
?
is it possible to use white instead of gray for the background color ?
The following snippet doesn't show the desired effect.
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
fig = plt.figure(figsize=(10,8))
ax = fig.gca(projection='3d')
ax.grid(color='r',linestyle='-',linewdith=2)
Nils