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...musing on data.frames when I decided what I needed was a SQL like 'select' statement. Before I get involved in writing something like that, has anyone else written anything that allows a relational like algebra on data.frames? Thanks, John Carter EMail: ece at dwaf-hri.pwv.gov.za Telephone : 27-12-808-0374x194 Fax:- 27-12-808-0338 <http://www.geocities.com/SoHo/Cafe/5947> or <http://iwqs.pwv.gov.za> When I grow up, I'm going to be a range of mountains! -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing lis...

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I have read in the date, using chron, and plotted a time-series of concentration vs date. How do display the date on the x-axis? "This universe never did make sense; I suspect it was built on a government contract." -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send

Another beginner's question. Still trying trying to read and and plot a simple tds-value vs time. input file: onedat date time tds 1997-12-29 13:35:00 411 > onedat<-read.table("onedat",header=T) attach(onedat) > x<-chron(dates=as.vector(date),times=as.vector(time), format=c("y-md","h:m:s")) > x [1] (97-12-29 13:35:00) See my problem? Chron

------------------------------------------------- SAMPLE SCRIPT: x<-rnorm(50) y<-12*x+30*rnorm(10) ff<-lm(y~x) sink("output.txt") print(ff) # this work give basic coefficients summary(ff) # should give Rsquare etc sink() ------------------------------------------------- Having fitted a curve on a data set, I am trying to write all the statistics about the fit to a file. In

I am trying to use the Windows version of R to do the following: - Have a Delphi front-end which gets the user input - Delphi will produce a R script, do a system call to R to calculate the statistics. Is there a better way? Maybe a library one can use in Delphi or Visual C? - How do one see a graph? A graph is plotted in a window which IMMEDIATELY closes afterwords so that one can't