rcParams['figure.dpi'] has no effect?

Community matplotlib-users
1

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

2

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 <danielstefanmader@…982…> 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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3

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)

> 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,

···

On Fri, Jan 21, 2011 at 9:08 AM, Daniel Mader < > danielstefanmader@...982...> wrote:

--
Paul Ivanov
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4

Ah, thank you very much, that helped! It works nicely!

Best regards,
Daniel