[R] scanning a pdf scan

Gabor Grothendieck ggrothendieck at gmail.com
Fri Oct 27 18:52:51 CEST 2006

I don't have specific experience with this but strapply
of package gsubfn can extract information from a string by content
as opposed to delimiters. e.g.

> library(gsubfn)
> strapply("abc34def56xyz", "[0-9]+", c)[[1]]
[1] "34" "56"

On 10/27/06, roger koenker <rkoenker at uiuc.edu> wrote:
> I have a pdf scan of several pages of data from a quite famous old
> paper by
> C.S. Pierce (1873).  I would like (what else?) to convert it into an
> R dataframe.
> Somewhat to my surprise the pdf seems to already be in a character
> recognized
> form, since I can search for numerical strings and they are nicely
> found.  Of
> course, as is usual with such tables there are also headings and
> column lines, etc
> etc. that are less interesting than the numbers themselves.  I've
> tried saving the
> pdf in various formats, some of which look vaguely tractable, but I'm
> hoping
> that there is something that is more automatic.
> Does anyone have experience that they could share toward this objective?
> url:    www.econ.uiuc.edu/~roger            Roger Koenker
> email    rkoenker at uiuc.edu            Department of Economics
> vox:     217-333-4558                University of Illinois
> fax:       217-244-6678                Champaign, IL 61820
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