Re: [R] How can I obtain smooth lines in graphs?

From: Judith Flores <juryef_at_yahoo.com>
Date: Wed, 20 Jun 2007 17:38:03 -0700 (PDT)


Thank you Marc,

   I am using R (version 2.5.0), Windows 2000, and Power Point as the final output and yes, you are right regarding the quality of a PDF file, it's much better than the ones I have tried so far (JPEG, PNG).

   How can I increase the DPIs?

Thank you,

Judith
--- Marc Schwartz <marc_schwartz_at_comcast.net> wrote:

> On Wed, 2007-06-20 at 17:05 -0700, Judith Flores
> wrote:
> > Hi,
> >
> > I need to plot lines in a graph, but when I run
> the
> > corresponding commands I obtain pixel-like lines,
> they
> > need to be smooth, is there a way to do this?
> >
> > Thank you,
> >
> > Judith
>
> Judith,
>
> You will need to provide more information (version
> of R, OS, output
> device, etc.) and some sample code.
>
> If you are generating a bitmapped image file such as
> PNG or JPEG, as
> opposed to a vector based image such as PDF, EPS or
> WMF/EMF then there
> is not much you can do with respect to the
> pixelation of curved/angled
> lines or curves/angles in text. You can increase
> the dpi (dots per
> inch) to enhance the relative resolution (at the
> expense of a larger
> file), but the image quality is still dependent on
> the device upon which
> the image is viewed.
>
> Pending further information, if you need high
> quality output, depending
> upon the intended use, then you want to use vector
> based images.
>
> HTH,
>
> Marc Schwartz
>
>
>



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