You can do this: Lines <- "A,B 1,2 3,4" DF <- read.csv(textConnection(Lines))
which is slightly simpler than the examples there. On Sun, Mar 2, 2008 at 5:59 PM, Gene Selkov <[EMAIL PROTECTED]> wrote: > Hi Dirk, > > I didn't at first pay attention to your comment about littler, as my > original problem of plotting to stdout was solved. But it was just part of > the larger problem: I actually need to be piping the data with the code > for making the picture in, and getting the picture out without opening any > files. This is to be run in a server environment, where the use of temp > files is not really acceptable. > > Having solved half of the problem, I feel cornered again, because I > haven't found a nice way of mixing code and data in R. > > I am aware that this issue was brought up before; I am not sure I like the > solutions suggested, because they involve the R language parsing and > interpreting for each data row -- if I understand correctly. > > http://tolstoy.newcastle.edu.au/R/help/03a/6750.html > > Are these solutions the best currently available? That thread is almost 5 > years old now. > > Let me give you an example of what I would like to be possible: > > In postgres, I can read this from stdin: > > CREATE TABLE remark ( > "case" smallint, > text text > ); > > COPY remark ("case", text) FROM stdin; > 877 lymph node biopsy > 909 Unresectable mass in the body of the pancreas > \. > > ... more SQL .... > > It allows the "code" and "input" chunks to be mixed, because the > input for stdin is always terminated by a special token, '\.', and so the > parser can skip the data chunks without interpreting them. > > Almost similarly, perl has the __DATA__ token, that allows a portion of > text within a program to be treated as stdin. > > I wonder whether anything like this is possible in R or littler. > > > Thanks, > > --Gene > > > On Fri, 7 Sep 2007, Dirk Eddelbuettel wrote: > > > On Fri, Sep 07, 2007 at 02:27:00PM -0400, Duncan Murdoch wrote: > >> On 9/7/2007 2:15 PM, Gene Selkov wrote: > >>> Thanks a ton, Duncan! > >>> > >>> So I have verified that this line works: > >>> > >>> echo "postscript(file=\"\", command=\"cat\"); plot(0)" | r --vanilla > >>> --slave > >>> > >>> Wonderful! (albeit a little unobvious) > >> > >> I would include an explicit "dev.off()" after the plotting; I'm not sure > >> all devices guarantee a clean shutdown when R quits. > > > > And for the record, both littler and Rscript can do that without the > > need for double quotes, at least under Linux. E.g. both > > > > $ r -e 'postscript(file="", command="cat"); plot(0)' | head > > $ Rscript -e 'postscript(file="", command="cat"); plot(0)' | head > > > > provide the same output (of the beginning of the postscript output). > > Our r is as usual somewhat faster, not that this matters in this > > non-repeat context. > > > > Dirk > > > > -- > > Three out of two people have difficulties with fractions. > > > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
