problem with png image

Damon McDougall
<damon.mcdougall@...287...> writes:

···

On Wed, Aug 22, 2012 at 11:28:54AM +0200, Petro wrote:

Hi list.
I generate some png images using matplotlib, and get very different
results depending on figuresize
__________________________________________________________________
  from pylab import figure, plot
  import pylab as plt
  import numpy as np
  figure()
  plt.subplot(2,1,1)
  plot(np.random.rand(10),'o')
  plt.subplot(2,1,2)
  plot(np.random.rand(10),'o')
  pic_name='fit_rates1.png'
  path_name='/home/petro/tmp/'
  plt.savefig(path_name + pic_name)
__________________________________________________________________

the code above generates the following image:
https://lh3.googleusercontent.com/-107Ducz_CA0/UDShKMtejtI/AAAAAAAACls/YOeahS3tQA8/s400/fit_rates1.png

now if I increase a figure size parameter:
__________________________________________________________________
  from pylab import figure, plot
  import pylab as plt
  import numpy as np
  plt.ioff()
  from matplotlib import rcParams
  golden_mean = (np.sqrt(5)-1.0)/2.0 # Aesthetic ratio
  fig_width = 5.6 # width in inches
  fig_height = fig_width*golden_mean # height in inches
  rcParams['figure.figsize']=fig_width, fig_height*3
  figure()
  plt.subplot(2,1,1)
  plot(np.random.rand(10),'o')
  plt.subplot(2,1,2)
  plot(np.random.rand(10),'o')
  pic_name='fit_rates2.png'
  path_name='/home/petro/tmp/'
  plt.savefig(path_name + pic_name)
  
What backend are you using?

print plt.get_backend()

It outputs GTK.

Can you try the GtkAgg backend instead and confirm the bug isn't there? The "pure" Gtk backend doesn't see a lot of use these days and isn't very well tested.

Mike

···

On 08/22/2012 08:17 AM, Petro Khoroshyy wrote:

Damon McDougall
<damon.mcdougall@...287...> writes:

On Wed, Aug 22, 2012 at 11:28:54AM +0200, Petro wrote:

Hi list.
I generate some png images using matplotlib, and get very different
results depending on figuresize
__________________________________________________________________
   from pylab import figure, plot
   import pylab as plt
   import numpy as np
   figure()
   plt.subplot(2,1,1)
   plot(np.random.rand(10),'o')
   plt.subplot(2,1,2)
   plot(np.random.rand(10),'o')
   pic_name='fit_rates1.png'
   path_name='/home/petro/tmp/'
   plt.savefig(path_name + pic_name)
__________________________________________________________________

the code above generates the following image:
https://lh3.googleusercontent.com/-107Ducz_CA0/UDShKMtejtI/AAAAAAAACls/YOeahS3tQA8/s400/fit_rates1.png

now if I increase a figure size parameter:
__________________________________________________________________
   from pylab import figure, plot
   import pylab as plt
   import numpy as np
   plt.ioff()
   from matplotlib import rcParams
   golden_mean = (np.sqrt(5)-1.0)/2.0 # Aesthetic ratio
   fig_width = 5.6 # width in inches
   fig_height = fig_width*golden_mean # height in inches
   rcParams['figure.figsize']=fig_width, fig_height*3
   figure()
   plt.subplot(2,1,1)
   plot(np.random.rand(10),'o')
   plt.subplot(2,1,2)
   plot(np.random.rand(10),'o')
   pic_name='fit_rates2.png'
   path_name='/home/petro/tmp/'
   plt.savefig(path_name + pic_name)
   

What backend are you using?

print plt.get_backend()

It outputs GTK.

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