Re: [Matplotlib-users] rcParams['figure.dpi'] has no effect?

2011-01-21 Thread Bala subramanian
Daniel,
Did you try saving the figure with same dpi ?. Try the following.

plt.savefig('name',dpi=300)

On Fri, Jan 21, 2011 at 9:08 AM, Daniel Mader <
danielstefanma...@googlemail.com> wrote:

> Hi,
>
> I need to create a huge range of plots with need to fit into a report
> (OpenOffice or Word). In order to save the work of manual resizing them when
> dragged and dropped, I wanted to preset a correct figure size with a nice
> resolution:
>
> pylab.rcParams['figure.figsize'] = 5,4
> pylab.rcParams['figure.dpi'] = 300
>
> Now, the created figure has a size of 500x400 pixels, and when I import it
> into a word processor, its dimensions are reported as 12.7x10.16cm², which
> matches the figsize definition. Yet, the resulting images are pretty much
> blurred...
>
> How can I increase the resolution, or what am I doing wrong?
> Thanks in advance,
> Daniel
>
>
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Re: [Matplotlib-users] rcParams['figure.dpi'] has no effect?

2011-01-21 Thread Paul Ivanov
Bala subramanian, on 2011-01-21 12:17,  wrote:
> Daniel,
> Did you try saving the figure with same dpi ?. Try the following.
> 
> plt.savefig('name',dpi=300)
> 
> On Fri, Jan 21, 2011 at 9:08 AM, Daniel Mader <
> danielstefanma...@googlemail.com> wrote:
> 
> > Hi,
> >
> > I need to create a huge range of plots with need to fit into a report
> > (OpenOffice or Word). In order to save the work of manual resizing them when
> > dragged and dropped, I wanted to preset a correct figure size with a nice
> > resolution:
> >
> > pylab.rcParams['figure.figsize'] = 5,4
> > pylab.rcParams['figure.dpi'] = 300
> >
> > Now, the created figure has a size of 500x400 pixels, and when I import it
> > into a word processor, its dimensions are reported as 12.7x10.16cm², which
> > matches the figsize definition. Yet, the resulting images are pretty much
> > blurred...
> >
> > How can I increase the resolution, or what am I doing wrong?

Hi Daniel,

As Bala alluded - there's a difference between display dpi and
the file saving dpi. Your change to rcParams only affected the
displayed resolution, not the resolution of saved files. 

Quoting from .matplotlibrc

  # the default savefig params can be different from the display params
  # Eg, you may want a higher resolution, or to make the figure
  # background white
  #savefig.dpi   : 100  # figure dots per inch

So try playing around with that parameter (which is what you're
doing if you call plt.savefig('name', dpi=300)

best,
-- 
Paul Ivanov
314 address only used for lists,  off-list direct email at:
http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7 


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Re: [Matplotlib-users] rcParams['figure.dpi'] has no effect?

2011-01-23 Thread Daniel Mader
Ah, thank you very much, that helped! It works nicely!

Best regards,
Daniel
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