[Matplotlib-users] problem with patches in animation
Hello list, I am trying to animate a patch. The animation should show a circle orbiting around a point. I took the code from http://nickcharlton.net/posts/drawing-animating-shapes-matplotlib.html Problem is that when I run the code, the animation doesn't remove the initial position of the circle (blit is True) while it works correctly on the website referenced above. Does anybody else see this behavior? Here's the code: import numpy as np from matplotlib import pyplot as plt from matplotlib import animation fig = plt.figure() fig.set_dpi(100) fig.set_size_inches(7, 6.5) ax = plt.axes(xlim=(0, 10), ylim=(0, 10)) patch = plt.Circle((5, -5), 0.75, fc='y') def init(): patch.center = (5, 5) ax.add_patch(patch) return patch, def animate(i): x, y = patch.center x = 5 + 3 * np.sin(np.radians(i)) y = 5 + 3 * np.cos(np.radians(i)) patch.center = (x, y) return patch, anim = animation.FuncAnimation(fig, animate, init_func=init, frames=360, interval=20, blit=True) plt.show() Thanks, Mark -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] problem with patches in animation
Hi Mark, I can't say this is the 'proper' solution or the correct interpretation, but it should work. I think when blitting that the init function serves as a something of a background for the rest of the animation. So try changing def init(): *patch.center = (5, 5)* ax.add_patch(patch) return patch, to def init(): *patch.center = (5, -5)* ax.add_patch(patch) return patch, Cheers, Ray On Wed, Apr 23, 2014 at 5:44 AM, Mark Bakker mark...@gmail.com wrote: Hello list, I am trying to animate a patch. The animation should show a circle orbiting around a point. I took the code from http://nickcharlton.net/posts/drawing-animating-shapes-matplotlib.html Problem is that when I run the code, the animation doesn't remove the initial position of the circle (blit is True) while it works correctly on the website referenced above. Does anybody else see this behavior? Here's the code: import numpy as np from matplotlib import pyplot as plt from matplotlib import animation fig = plt.figure() fig.set_dpi(100) fig.set_size_inches(7, 6.5) ax = plt.axes(xlim=(0, 10), ylim=(0, 10)) patch = plt.Circle((5, -5), 0.75, fc='y') def init(): patch.center = (5, 5) ax.add_patch(patch) return patch, def animate(i): x, y = patch.center x = 5 + 3 * np.sin(np.radians(i)) y = 5 + 3 * np.cos(np.radians(i)) patch.center = (x, y) return patch, anim = animation.FuncAnimation(fig, animate, init_func=init, frames=360, interval=20, blit=True) plt.show() Thanks, Mark -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] problem with patches in animation
I thought about that. I even thought about changing the initial color to white or radius to zero. But I am thinking this is a bug. When blitting, whatever is created with the init function is not removed. That is why lines that are animated initially have no data. For a Patch object this is a bit harder, as it needs something to begin with. It seems that this used to work in a previous version. Should I file a bug report? Mark On Wed, Apr 23, 2014 at 3:34 PM, Raymond Smith smit...@mit.edu wrote: Hi Mark, I can't say this is the 'proper' solution or the correct interpretation, but it should work. I think when blitting that the init function serves as a something of a background for the rest of the animation. So try changing def init(): *patch.center = (5, 5)* ax.add_patch(patch) return patch, to def init(): *patch.center = (5, -5)* ax.add_patch(patch) return patch, Cheers, Ray On Wed, Apr 23, 2014 at 5:44 AM, Mark Bakker mark...@gmail.com wrote: Hello list, I am trying to animate a patch. The animation should show a circle orbiting around a point. I took the code from http://nickcharlton.net/posts/drawing-animating-shapes-matplotlib.html Problem is that when I run the code, the animation doesn't remove the initial position of the circle (blit is True) while it works correctly on the website referenced above. Does anybody else see this behavior? Here's the code: import numpy as np from matplotlib import pyplot as plt from matplotlib import animation fig = plt.figure() fig.set_dpi(100) fig.set_size_inches(7, 6.5) ax = plt.axes(xlim=(0, 10), ylim=(0, 10)) patch = plt.Circle((5, -5), 0.75, fc='y') def init(): patch.center = (5, 5) ax.add_patch(patch) return patch, def animate(i): x, y = patch.center x = 5 + 3 * np.sin(np.radians(i)) y = 5 + 3 * np.cos(np.radians(i)) patch.center = (x, y) return patch, anim = animation.FuncAnimation(fig, animate, init_func=init, frames=360, interval=20, blit=True) plt.show() Thanks, Mark -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] problem with patches in animation
Well, the intended behavior of init() isn't completely clear to me after reading over some of the docs http://matplotlib.org/contents.html and examples http://matplotlib.org/examples/animation/index.html, so I'm not sure if it's a bug or not. Either way, it could be a request for documentation, perhaps. On Wed, Apr 23, 2014 at 10:08 AM, Mark Bakker mark...@gmail.com wrote: I thought about that. I even thought about changing the initial color to white or radius to zero. But I am thinking this is a bug. When blitting, whatever is created with the init function is not removed. That is why lines that are animated initially have no data. For a Patch object this is a bit harder, as it needs something to begin with. It seems that this used to work in a previous version. Should I file a bug report? Mark On Wed, Apr 23, 2014 at 3:34 PM, Raymond Smith smit...@mit.edu wrote: Hi Mark, I can't say this is the 'proper' solution or the correct interpretation, but it should work. I think when blitting that the init function serves as a something of a background for the rest of the animation. So try changing def init(): *patch.center = (5, 5)* ax.add_patch(patch) return patch, to def init(): *patch.center = (5, -5)* ax.add_patch(patch) return patch, Cheers, Ray On Wed, Apr 23, 2014 at 5:44 AM, Mark Bakker mark...@gmail.com wrote: Hello list, I am trying to animate a patch. The animation should show a circle orbiting around a point. I took the code from http://nickcharlton.net/posts/drawing-animating-shapes-matplotlib.html Problem is that when I run the code, the animation doesn't remove the initial position of the circle (blit is True) while it works correctly on the website referenced above. Does anybody else see this behavior? Here's the code: import numpy as np from matplotlib import pyplot as plt from matplotlib import animation fig = plt.figure() fig.set_dpi(100) fig.set_size_inches(7, 6.5) ax = plt.axes(xlim=(0, 10), ylim=(0, 10)) patch = plt.Circle((5, -5), 0.75, fc='y') def init(): patch.center = (5, 5) ax.add_patch(patch) return patch, def animate(i): x, y = patch.center x = 5 + 3 * np.sin(np.radians(i)) y = 5 + 3 * np.cos(np.radians(i)) patch.center = (x, y) return patch, anim = animation.FuncAnimation(fig, animate, init_func=init, frames=360, interval=20, blit=True) plt.show() Thanks, Mark -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] problem with patches in animation
Working off of very faded memory, try not to return any objects in your init function that you intend to be animated. If I remember correctly, when blitting is True, the animator treats any object returned by the init() function as background objects, and any objects returned by the animation function as blittable. Since your patch is returned in both functions, I think it is getting confused. Again, very rusty memory here... Ben Root On Wed, Apr 23, 2014 at 9:34 AM, Raymond Smith smit...@mit.edu wrote: Hi Mark, I can't say this is the 'proper' solution or the correct interpretation, but it should work. I think when blitting that the init function serves as a something of a background for the rest of the animation. So try changing def init(): *patch.center = (5, 5)* ax.add_patch(patch) return patch, to def init(): *patch.center = (5, -5)* ax.add_patch(patch) return patch, Cheers, Ray On Wed, Apr 23, 2014 at 5:44 AM, Mark Bakker mark...@gmail.com wrote: Hello list, I am trying to animate a patch. The animation should show a circle orbiting around a point. I took the code from http://nickcharlton.net/posts/drawing-animating-shapes-matplotlib.html Problem is that when I run the code, the animation doesn't remove the initial position of the circle (blit is True) while it works correctly on the website referenced above. Does anybody else see this behavior? Here's the code: import numpy as np from matplotlib import pyplot as plt from matplotlib import animation fig = plt.figure() fig.set_dpi(100) fig.set_size_inches(7, 6.5) ax = plt.axes(xlim=(0, 10), ylim=(0, 10)) patch = plt.Circle((5, -5), 0.75, fc='y') def init(): patch.center = (5, 5) ax.add_patch(patch) return patch, def animate(i): x, y = patch.center x = 5 + 3 * np.sin(np.radians(i)) y = 5 + 3 * np.cos(np.radians(i)) patch.center = (x, y) return patch, anim = animation.FuncAnimation(fig, animate, init_func=init, frames=360, interval=20, blit=True) plt.show() Thanks, Mark -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] problem with patches in animation
This is pretty weird. If instead of Mark's original script, if I move the
add_patch out of init and have the init simply return an empty tuple, it
_mostly_ works as expected. But -- at least on my computer -- on some runs,
it has the moving circle, but also leaves a circle at the top, starting
point, whereas on other runs it simply has the desired moving circle with
no 'background' circle. Usually, it will happen at least once if I start
the animation script 10 times. So still, the init function is a bit of a
mystery to me.
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
fig = plt.figure()
fig.set_dpi(100)
fig.set_size_inches(7, 6.5)
ax = plt.axes(xlim=(0, 10), ylim=(0, 10))
patch = plt.Circle((5, -5), 0.75, fc='y')
ax.add_patch(patch)
def init():
return tuple()
def animate(i):
x, y = patch.center
patch.set_facecolor('y')
patch.set_edgecolor('k')
x = 5 + 3 * np.sin(np.radians(i))
y = 5 + 3 * np.cos(np.radians(i))
patch.center = (x, y)
return patch,
anim = animation.FuncAnimation(fig, animate,
init_func=init,
frames=360,
interval=20,
blit=True)
plt.show()
On Wed, Apr 23, 2014 at 10:29 AM, Benjamin Root ben.r...@ou.edu wrote:
Working off of very faded memory, try not to return any objects in your
init function that you intend to be animated. If I remember correctly, when
blitting is True, the animator treats any object returned by the init()
function as background objects, and any objects returned by the animation
function as blittable. Since your patch is returned in both functions, I
think it is getting confused.
Again, very rusty memory here...
Ben Root
On Wed, Apr 23, 2014 at 9:34 AM, Raymond Smith smit...@mit.edu wrote:
Hi Mark,
I can't say this is the 'proper' solution or the correct interpretation,
but it should work.
I think when blitting that the init function serves as a something of a
background for the rest of the animation. So try changing
def init():
*patch.center = (5, 5)*
ax.add_patch(patch)
return patch,
to
def init():
*patch.center = (5, -5)*
ax.add_patch(patch)
return patch,
Cheers,
Ray
On Wed, Apr 23, 2014 at 5:44 AM, Mark Bakker mark...@gmail.com wrote:
Hello list,
I am trying to animate a patch. The animation should show a circle
orbiting around a point. I took the code from
http://nickcharlton.net/posts/drawing-animating-shapes-matplotlib.html
Problem is that when I run the code, the animation doesn't remove the
initial position of the circle (blit is True) while it works correctly on
the website referenced above.
Does anybody else see this behavior? Here's the code:
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
fig = plt.figure()
fig.set_dpi(100)
fig.set_size_inches(7, 6.5)
ax = plt.axes(xlim=(0, 10), ylim=(0, 10))
patch = plt.Circle((5, -5), 0.75, fc='y')
def init():
patch.center = (5, 5)
ax.add_patch(patch)
return patch,
def animate(i):
x, y = patch.center
x = 5 + 3 * np.sin(np.radians(i))
y = 5 + 3 * np.cos(np.radians(i))
patch.center = (x, y)
return patch,
anim = animation.FuncAnimation(fig, animate,
init_func=init,
frames=360,
interval=20,
blit=True)
plt.show()
Thanks, Mark
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Re: [Matplotlib-users] problem with patches in animation
I think it is because the figure may or may not have some things drawn by
the time the blitting starts. This is due to draw_idle(). So, it is trying
to capture whatever is in the figure's canvas, but drawing may or may not
have happened yet.
Try this:
def animate(i):
if not animate.patch:
animate.patch = plt.Circle((5, -5), 0.75, fc='y')
animate.ax.add_patch(animate.patch)
x, y = animate.patch.center
x = 5 + 3 * np.sin(np.radians(i))
y = 5 + 3 * np.cos(np.radians(i))
animate.patch.center = (x, y)
return animate.patch,
animate.ax = ax
animate.patch = None
If you have something more complicated, then just go full bore and use
classes to store the state.
Cheers!
Ben Root
On Wed, Apr 23, 2014 at 10:51 AM, Raymond Smith smit...@mit.edu wrote:
This is pretty weird. If instead of Mark's original script, if I move the
add_patch out of init and have the init simply return an empty tuple, it
_mostly_ works as expected. But -- at least on my computer -- on some runs,
it has the moving circle, but also leaves a circle at the top, starting
point, whereas on other runs it simply has the desired moving circle with
no 'background' circle. Usually, it will happen at least once if I start
the animation script 10 times. So still, the init function is a bit of a
mystery to me.
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
fig = plt.figure()
fig.set_dpi(100)
fig.set_size_inches(7, 6.5)
ax = plt.axes(xlim=(0, 10), ylim=(0, 10))
patch = plt.Circle((5, -5), 0.75, fc='y')
ax.add_patch(patch)
def init():
return tuple()
def animate(i):
x, y = patch.center
patch.set_facecolor('y')
patch.set_edgecolor('k')
x = 5 + 3 * np.sin(np.radians(i))
y = 5 + 3 * np.cos(np.radians(i))
patch.center = (x, y)
return patch,
anim = animation.FuncAnimation(fig, animate,
init_func=init,
frames=360,
interval=20,
blit=True)
plt.show()
On Wed, Apr 23, 2014 at 10:29 AM, Benjamin Root ben.r...@ou.edu wrote:
Working off of very faded memory, try not to return any objects in your
init function that you intend to be animated. If I remember correctly, when
blitting is True, the animator treats any object returned by the init()
function as background objects, and any objects returned by the animation
function as blittable. Since your patch is returned in both functions, I
think it is getting confused.
Again, very rusty memory here...
Ben Root
On Wed, Apr 23, 2014 at 9:34 AM, Raymond Smith smit...@mit.edu wrote:
Hi Mark,
I can't say this is the 'proper' solution or the correct interpretation,
but it should work.
I think when blitting that the init function serves as a something of a
background for the rest of the animation. So try changing
def init():
*patch.center = (5, 5)*
ax.add_patch(patch)
return patch,
to
def init():
*patch.center = (5, -5)*
ax.add_patch(patch)
return patch,
Cheers,
Ray
On Wed, Apr 23, 2014 at 5:44 AM, Mark Bakker mark...@gmail.com wrote:
Hello list,
I am trying to animate a patch. The animation should show a circle
orbiting around a point. I took the code from
http://nickcharlton.net/posts/drawing-animating-shapes-matplotlib.html
Problem is that when I run the code, the animation doesn't remove the
initial position of the circle (blit is True) while it works correctly on
the website referenced above.
Does anybody else see this behavior? Here's the code:
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
fig = plt.figure()
fig.set_dpi(100)
fig.set_size_inches(7, 6.5)
ax = plt.axes(xlim=(0, 10), ylim=(0, 10))
patch = plt.Circle((5, -5), 0.75, fc='y')
def init():
patch.center = (5, 5)
ax.add_patch(patch)
return patch,
def animate(i):
x, y = patch.center
x = 5 + 3 * np.sin(np.radians(i))
y = 5 + 3 * np.cos(np.radians(i))
patch.center = (x, y)
return patch,
anim = animation.FuncAnimation(fig, animate,
init_func=init,
frames=360,
interval=20,
blit=True)
plt.show()
Thanks, Mark
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Re: [Matplotlib-users] Make clear figure used in the powerpoint slides?
yes, Ben, I understand the difference now.
To Mike: I have to select the region of the figure I need in the pdf file
and paste it in the powerpoint ... Isn't this you're doing as well?
But fine, I can go with the current quality. Thanks to you all for this
discussion.
Cheers,
Chao
On Tue, Apr 22, 2014 at 3:31 PM, Benjamin Root ben.r...@ou.edu wrote:
Yes, there is a difference if you use the button versus explicitly stating
the dpi in a savefig call. When you use the button, matplotlib has to use
the default dpi since there is no other way to specify it.
Cheers!
Ben Root
On Mon, Apr 21, 2014 at 5:03 PM, Chao YUE chaoyue...@gmail.com wrote:
Yes, in fact I set dpi as 1000, which is already very high. In fact I
have another question, will there be any difference if I use the save
button on the interactive plotting toolbar and use the command line
figure.savefig('xx.png',dpi=1000)?
Chao
On Mon, Apr 21, 2014 at 10:59 PM, Jody Klymak jkly...@uvic.ca wrote:
Did you set the dpi of the png?
Cheers, Jody
On Apr 21, 2014, at 13:50 PM, ChaoYue chaoyue...@gmail.com wrote:
OK, I tried but I don't really see the difference between jpg and png by
my eyes in the attached case, maybe for other more complicated plots there
will be real difference. Anyway, thanks to all for your nice discussions.
And, BTW, I tried 2 hours trying to find a way to convert svg to emf, but
now I konw :p
Cheers,
Chao
On Mon, Apr 21, 2014 at 9:49 PM, Benjamin Root-2 [via matplotlib] [hidden
email] wrote:
JPGs will *always* have bit blur as it is a lossy image format. PNGs
would be a better bet.
Ben Root
On Mon, Apr 21, 2014 at 3:33 PM, ChaoYue [hidden
email]http://user/SendEmail.jtp?type=nodenode=43265i=0
wrote:
Hi all,
Thank you all for your kind response. I am sorry, but none of these
solutions significantly improved the visual quality on microsoft
powerpiont
2007. Thought I didn't try eps. So probably l have to go with the current
quality.
here is a best case I have now:
https://www.dropbox.com/s/0uhjogalz92hssm/different_figure_example.pptx
You can still see the a bit blur everywhere (currently with jpg
being inserted directly). I didn't have better quality than this one by
trying the method as suggested by you. Let me know if I am raising too
much
high demand for this.
Cheers,
Chao
On Mon, Apr 21, 2014 at 4:41 PM, Jonathan Slavin [via matplotlib] [hidden
email] http://user/SendEmail.jtp?type=nodenode=43264i=0 wrote:
Another alternative, if a vector graphics format doesn't work, is to
make your png figure large. Then when you shrink it down to fit in your
slide, it should still have good resolution.
Jon
On Mon, Apr 21, 2014 at 10:13 AM, [hidden
email]http://user/SendEmail.jtp?type=nodenode=43262i=0
wrote:
No Powerpoint version I know supports SVG (or any vector graphics
format useful in this case) and Matplotlib does not
export WMF graphics anymore. So the easiest way is to use PNGs, if
you can live with raster graphics.
Alternatively, if you need vector graphics, you can export the
Matplotlib plot as SVG and convert it to WMF or EMF using
Inkscape. This can be done in the command line like this:
c:\Program Files\Inkscape-0.48\inkscape.exe --without-gui
--export-emf=output.emf input.svg
Juergen
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Re: [Matplotlib-users] Make clear figure used in the powerpoint slides?
On Apr 23, 2014, at 8:35 AM, Chao YUE chaoyue...@gmail.com wrote:
yes, Ben, I understand the difference now.
To Mike: I have to select the region of the figure I need in the pdf file and
paste it in the powerpoint ... Isn't this you're doing as well?
Why do you need to select a region? This takes a screen grab that will be
terrible quality, doesn't it? Just drag the file into powerpoint (or use
insert/picture). If you need to crop the PDF do that in Acrobat, or whatever
PDF software you use.
Cheers, Jody
But fine, I can go with the current quality. Thanks to you all for this
discussion.
Cheers,
Chao
On Tue, Apr 22, 2014 at 3:31 PM, Benjamin Root ben.r...@ou.edu wrote:
Yes, there is a difference if you use the button versus explicitly stating
the dpi in a savefig call. When you use the button, matplotlib has to use the
default dpi since there is no other way to specify it.
Cheers!
Ben Root
On Mon, Apr 21, 2014 at 5:03 PM, Chao YUE chaoyue...@gmail.com wrote:
Yes, in fact I set dpi as 1000, which is already very high. In fact I have
another question, will there be any difference if I use the save button on
the interactive plotting toolbar and use the command line
figure.savefig('xx.png',dpi=1000)?
Chao
On Mon, Apr 21, 2014 at 10:59 PM, Jody Klymak jkly...@uvic.ca wrote:
Did you set the dpi of the png?
Cheers, Jody
On Apr 21, 2014, at 13:50 PM, ChaoYue chaoyue...@gmail.com wrote:
OK, I tried but I don't really see the difference between jpg and png by my
eyes in the attached case, maybe for other more complicated plots there will
be real difference. Anyway, thanks to all for your nice discussions. And,
BTW, I tried 2 hours trying to find a way to convert svg to emf, but now I
konw :p
Cheers,
Chao
On Mon, Apr 21, 2014 at 9:49 PM, Benjamin Root-2 [via matplotlib] [hidden
email] wrote:
JPGs will *always* have bit blur as it is a lossy image format. PNGs would
be a better bet.
Ben Root
On Mon, Apr 21, 2014 at 3:33 PM, ChaoYue [hidden email] wrote:
Hi all,
Thank you all for your kind response. I am sorry, but none of these
solutions significantly improved the visual quality on microsoft powerpiont
2007. Thought I didn't try eps. So probably l have to go with the current
quality.
here is a best case I have now:
https://www.dropbox.com/s/0uhjogalz92hssm/different_figure_example.pptx
You can still see the a bit blur everywhere (currently with jpg being
inserted directly). I didn't have better quality than this one by trying the
method as suggested by you. Let me know if I am raising too much high demand
for this.
Cheers,
Chao
On Mon, Apr 21, 2014 at 4:41 PM, Jonathan Slavin [via matplotlib] [hidden
email] wrote:
Another alternative, if a vector graphics format doesn't work, is to make
your png figure large. Then when you shrink it down to fit in your slide,
it should still have good resolution.
Jon
On Mon, Apr 21, 2014 at 10:13 AM, [hidden email] wrote:
No Powerpoint version I know supports SVG (or any vector graphics format
useful in this case) and Matplotlib does not
export WMF graphics anymore. So the easiest way is to use PNGs, if you can
live with raster graphics.
Alternatively, if you need vector graphics, you can export the Matplotlib
plot as SVG and convert it to WMF or EMF using
Inkscape. This can be done in the command line like this:
c:\Program Files\Inkscape-0.48\inkscape.exe --without-gui
--export-emf=output.emf input.svg
Juergen
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Re: [Matplotlib-users] Make clear figure used in the powerpoint slides?
On Apr 23, 2014, at 11:41AM, Jody Klymak wrote: On Apr 23, 2014, at 8:35 AM, Chao YUE chaoyue...@gmail.com wrote: yes, Ben, I understand the difference now. To Mike: I have to select the region of the figure I need in the pdf file and paste it in the powerpoint ... Isn't this you're doing as well? Why do you need to select a region? This takes a screen grab that will be terrible quality, doesn't it? Just drag the file into powerpoint (or use insert/picture). If you need to crop the PDF do that in Acrobat, or whatever PDF software you use. Cheers, Jody On a windows computer, I found these instructions for inserting a pdf file into powerpoint: [1] These instructions indicate that you can not simply insert a pdf picture, as is done on a Mac, which might explain why he was selecting a region of the figure in a pdf viewer. Chao, I'm not sure if the dpi setting or png format for savefig helped you. In the future if you have to cut out a part of a pdf file, and if you are using Adobe reader, then there is a setting in the preferences for customizing the resolution of the clip you are selecting. -Sterling [1] http://office.microsoft.com/en-us/powerpoint-help/insert-pdf-file-content-into-a-powerpoint-presentation-HA102809687.aspx -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] problem with patches in animation
Benjamin,
I don't mind doing classes to store the state, but isn't a Patch already a
class?
Do you know of an example online that I can work off?
Thanks for your suggestions,
Mark
On Wed, Apr 23, 2014 at 5:12 PM, Benjamin Root ben.r...@ou.edu wrote:
I think it is because the figure may or may not have some things drawn by
the time the blitting starts. This is due to draw_idle(). So, it is trying
to capture whatever is in the figure's canvas, but drawing may or may not
have happened yet.
Try this:
def animate(i):
if not animate.patch:
animate.patch = plt.Circle((5, -5), 0.75, fc='y')
animate.ax.add_patch(animate.patch)
x, y = animate.patch.center
x = 5 + 3 * np.sin(np.radians(i))
y = 5 + 3 * np.cos(np.radians(i))
animate.patch.center = (x, y)
return animate.patch,
animate.ax = ax
animate.patch = None
If you have something more complicated, then just go full bore and use
classes to store the state.
Cheers!
Ben Root
On Wed, Apr 23, 2014 at 10:51 AM, Raymond Smith smit...@mit.edu wrote:
This is pretty weird. If instead of Mark's original script, if I move the
add_patch out of init and have the init simply return an empty tuple, it
_mostly_ works as expected. But -- at least on my computer -- on some runs,
it has the moving circle, but also leaves a circle at the top, starting
point, whereas on other runs it simply has the desired moving circle with
no 'background' circle. Usually, it will happen at least once if I start
the animation script 10 times. So still, the init function is a bit of a
mystery to me.
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
fig = plt.figure()
fig.set_dpi(100)
fig.set_size_inches(7, 6.5)
ax = plt.axes(xlim=(0, 10), ylim=(0, 10))
patch = plt.Circle((5, -5), 0.75, fc='y')
ax.add_patch(patch)
def init():
return tuple()
def animate(i):
x, y = patch.center
patch.set_facecolor('y')
patch.set_edgecolor('k')
x = 5 + 3 * np.sin(np.radians(i))
y = 5 + 3 * np.cos(np.radians(i))
patch.center = (x, y)
return patch,
anim = animation.FuncAnimation(fig, animate,
init_func=init,
frames=360,
interval=20,
blit=True)
plt.show()
On Wed, Apr 23, 2014 at 10:29 AM, Benjamin Root ben.r...@ou.edu wrote:
Working off of very faded memory, try not to return any objects in your
init function that you intend to be animated. If I remember correctly, when
blitting is True, the animator treats any object returned by the init()
function as background objects, and any objects returned by the animation
function as blittable. Since your patch is returned in both functions, I
think it is getting confused.
Again, very rusty memory here...
Ben Root
On Wed, Apr 23, 2014 at 9:34 AM, Raymond Smith smit...@mit.edu wrote:
Hi Mark,
I can't say this is the 'proper' solution or the correct
interpretation, but it should work.
I think when blitting that the init function serves as a something of a
background for the rest of the animation. So try changing
def init():
*patch.center = (5, 5)*
ax.add_patch(patch)
return patch,
to
def init():
*patch.center = (5, -5)*
ax.add_patch(patch)
return patch,
Cheers,
Ray
On Wed, Apr 23, 2014 at 5:44 AM, Mark Bakker mark...@gmail.com wrote:
Hello list,
I am trying to animate a patch. The animation should show a circle
orbiting around a point. I took the code from
http://nickcharlton.net/posts/drawing-animating-shapes-matplotlib.html
Problem is that when I run the code, the animation doesn't remove the
initial position of the circle (blit is True) while it works correctly on
the website referenced above.
Does anybody else see this behavior? Here's the code:
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
fig = plt.figure()
fig.set_dpi(100)
fig.set_size_inches(7, 6.5)
ax = plt.axes(xlim=(0, 10), ylim=(0, 10))
patch = plt.Circle((5, -5), 0.75, fc='y')
def init():
patch.center = (5, 5)
ax.add_patch(patch)
return patch,
def animate(i):
x, y = patch.center
x = 5 + 3 * np.sin(np.radians(i))
y = 5 + 3 * np.cos(np.radians(i))
patch.center = (x, y)
return patch,
anim = animation.FuncAnimation(fig, animate,
init_func=init,
frames=360,
interval=20,
blit=True)
plt.show()
Thanks, Mark
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Re: [Matplotlib-users] problem with patches in animation
Raymond, The documentation says: If blit=True, *func* and *init_func* should return an iterable of drawables to clear. But clearly, whatever is set by init_func is not cleared during animation when blit=True, while it is cleared when blit=False. Unless anybody knows what I am doing wrong I will file a bug report. Thanks again, Mark On Wed, Apr 23, 2014 at 4:25 PM, Raymond Smith smit...@mit.edu wrote: Well, the intended behavior of init() isn't completely clear to me after reading over some of the docs http://matplotlib.org/contents.html and examples http://matplotlib.org/examples/animation/index.html, so I'm not sure if it's a bug or not. Either way, it could be a request for documentation, perhaps. On Wed, Apr 23, 2014 at 10:08 AM, Mark Bakker mark...@gmail.com wrote: I thought about that. I even thought about changing the initial color to white or radius to zero. But I am thinking this is a bug. When blitting, whatever is created with the init function is not removed. That is why lines that are animated initially have no data. For a Patch object this is a bit harder, as it needs something to begin with. It seems that this used to work in a previous version. Should I file a bug report? Mark On Wed, Apr 23, 2014 at 3:34 PM, Raymond Smith smit...@mit.edu wrote: Hi Mark, I can't say this is the 'proper' solution or the correct interpretation, but it should work. I think when blitting that the init function serves as a something of a background for the rest of the animation. So try changing def init(): *patch.center = (5, 5)* ax.add_patch(patch) return patch, to def init(): *patch.center = (5, -5)* ax.add_patch(patch) return patch, Cheers, Ray On Wed, Apr 23, 2014 at 5:44 AM, Mark Bakker mark...@gmail.com wrote: Hello list, I am trying to animate a patch. The animation should show a circle orbiting around a point. I took the code from http://nickcharlton.net/posts/drawing-animating-shapes-matplotlib.html Problem is that when I run the code, the animation doesn't remove the initial position of the circle (blit is True) while it works correctly on the website referenced above. Does anybody else see this behavior? Here's the code: import numpy as np from matplotlib import pyplot as plt from matplotlib import animation fig = plt.figure() fig.set_dpi(100) fig.set_size_inches(7, 6.5) ax = plt.axes(xlim=(0, 10), ylim=(0, 10)) patch = plt.Circle((5, -5), 0.75, fc='y') def init(): patch.center = (5, 5) ax.add_patch(patch) return patch, def animate(i): x, y = patch.center x = 5 + 3 * np.sin(np.radians(i)) y = 5 + 3 * np.cos(np.radians(i)) patch.center = (x, y) return patch, anim = animation.FuncAnimation(fig, animate, init_func=init, frames=360, interval=20, blit=True) plt.show() Thanks, Mark -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] problem with patches in animation
https://github.com/WeatherGod/BRadar
in scripts/, there is radarmovie.py which I create a few subclasses of
FuncAnimation, which was to solve a modularity issue I was having (I needed
self-contained animation classes that I could use pieces of elsewhere, but
still be able to join them all together into a single animation, as is the
case with radarmovie.py). Note, I do think I have an off-by-one error
somewhere, but I never have been able to figure it out, and these
particular animations do not use blitting because I didn't need it.
Now, you don't have to go all the way to subclassing FuncAnimation. The
suggestion about using classes is to avoid the (typically) bad style of
adding attributes to functions for the purpose of storing a state (which is
what a class is all about). You can't use a Patch object because the Patch
object wouldn't exist until the animation starts.
I hope that helps!
Ben Root
On Wed, Apr 23, 2014 at 3:38 PM, Mark Bakker mark...@gmail.com wrote:
Benjamin,
I don't mind doing classes to store the state, but isn't a Patch already a
class?
Do you know of an example online that I can work off?
Thanks for your suggestions,
Mark
On Wed, Apr 23, 2014 at 5:12 PM, Benjamin Root ben.r...@ou.edu wrote:
I think it is because the figure may or may not have some things drawn by
the time the blitting starts. This is due to draw_idle(). So, it is trying
to capture whatever is in the figure's canvas, but drawing may or may not
have happened yet.
Try this:
def animate(i):
if not animate.patch:
animate.patch = plt.Circle((5, -5), 0.75, fc='y')
animate.ax.add_patch(animate.patch)
x, y = animate.patch.center
x = 5 + 3 * np.sin(np.radians(i))
y = 5 + 3 * np.cos(np.radians(i))
animate.patch.center = (x, y)
return animate.patch,
animate.ax = ax
animate.patch = None
If you have something more complicated, then just go full bore and use
classes to store the state.
Cheers!
Ben Root
On Wed, Apr 23, 2014 at 10:51 AM, Raymond Smith smit...@mit.edu wrote:
This is pretty weird. If instead of Mark's original script, if I move
the add_patch out of init and have the init simply return an empty tuple,
it _mostly_ works as expected. But -- at least on my computer -- on some
runs, it has the moving circle, but also leaves a circle at the top,
starting point, whereas on other runs it simply has the desired moving
circle with no 'background' circle. Usually, it will happen at least once
if I start the animation script 10 times. So still, the init function is a
bit of a mystery to me.
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
fig = plt.figure()
fig.set_dpi(100)
fig.set_size_inches(7, 6.5)
ax = plt.axes(xlim=(0, 10), ylim=(0, 10))
patch = plt.Circle((5, -5), 0.75, fc='y')
ax.add_patch(patch)
def init():
return tuple()
def animate(i):
x, y = patch.center
patch.set_facecolor('y')
patch.set_edgecolor('k')
x = 5 + 3 * np.sin(np.radians(i))
y = 5 + 3 * np.cos(np.radians(i))
patch.center = (x, y)
return patch,
anim = animation.FuncAnimation(fig, animate,
init_func=init,
frames=360,
interval=20,
blit=True)
plt.show()
On Wed, Apr 23, 2014 at 10:29 AM, Benjamin Root ben.r...@ou.edu wrote:
Working off of very faded memory, try not to return any objects in your
init function that you intend to be animated. If I remember correctly, when
blitting is True, the animator treats any object returned by the init()
function as background objects, and any objects returned by the animation
function as blittable. Since your patch is returned in both functions, I
think it is getting confused.
Again, very rusty memory here...
Ben Root
On Wed, Apr 23, 2014 at 9:34 AM, Raymond Smith smit...@mit.edu wrote:
Hi Mark,
I can't say this is the 'proper' solution or the correct
interpretation, but it should work.
I think when blitting that the init function serves as a something of
a background for the rest of the animation. So try changing
def init():
*patch.center = (5, 5)*
ax.add_patch(patch)
return patch,
to
def init():
*patch.center = (5, -5)*
ax.add_patch(patch)
return patch,
Cheers,
Ray
On Wed, Apr 23, 2014 at 5:44 AM, Mark Bakker mark...@gmail.comwrote:
Hello list,
I am trying to animate a patch. The animation should show a circle
orbiting around a point. I took the code from
http://nickcharlton.net/posts/drawing-animating-shapes-matplotlib.html
Problem is that when I run the code, the animation doesn't remove the
initial position of the circle (blit is True) while it works correctly on
the website referenced above.
Does anybody else see this behavior? Here's the code:
import numpy as np
from matplotlib import pyplot as plt
from
[Matplotlib-users] turning off autoscale
I'm sorry, these are questions that could be found in the Axes documentation, but I really don't feel like scrolling through 100 pages that are irrelevant hoping I can find the relevant functions, which I don't even know what they are called. Is there ever going to be a concise listing of functions? Also there seem to be a lot of undocumented functions related to bounding boxes and copying from the background--I had to find Stack Overflow examples to learn about those. What I want to do is (1) plot a couple of lines with y autoscaling and x autoscaling on (2) turn off y autoscaling so the y limits do not change further if the x limits are changed (3) change the x limits What axes functions are needed? Note that I'm not using pyplot, rather the API so I'm looking for methods of Axes. Mike -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] turning off autoscale
On 2014/04/23 11:19 AM, Michael Mossey wrote: I'm sorry, these are questions that could be found in the Axes documentation, but I really don't feel like scrolling through 100 pages that are irrelevant hoping I can find the relevant functions, which I don't even know what they are called. Is there ever going to be a concise listing of functions? Also there seem to be a lot of PRs for doc improvements are welcome! undocumented functions related to bounding boxes and copying from the background--I had to find Stack Overflow examples to learn about those. Doesn't the search box in the html docs help? Or just plain browser searching when you are looking at the Axes API docs? I also find that ipython is very helpful, with tab completion and the question mark for getting the doc string. E.g., make an axes object and then use tab completion to see the methods that start with auto, and follow with a question mark to see the docstring. Or a double question mark to see the code. What I want to do is (1) plot a couple of lines with y autoscaling and x autoscaling on (2) turn off y autoscaling so the y limits do not change further if the x limits are changed (3) change the x limits What axes functions are needed? try: ax.autoscale(enable=False, axis='y') or ax.set_autoscaley_on(False) Ugly name for the method, but we're stuck with it. These differ in that the first one turns y scaling off and then performs the autoscaling, while the second only turns y scaling off for any subsequent execution of the autoscale_view() method. Eric Note that I'm not using pyplot, rather the API so I'm looking for methods of Axes. Mike -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
