folks, I have been struggling with the "R" documentation for too long now and I need a simple answer on two questions. The documentation does not have adequate examples. Please help. given two equal vector lists: A <- c(0,1,2,3) B <- c(5,6,7,8) [Question #1] how do I dump them to a text file with the following format: ------------------------------------------------------------ [line 1] 0.0000000 5.0000000 [line 2] 1.0000000 6.0000000 [line 3] 2.0000000 7.0000000 [line 4] 3.0000000 8.0000000 ------------------------------------------------------------ [Question #2] ------------------------------------------------------------ how do you make log-log plot that looks like it was plotted on log-log graph paper? ------------------------------------------------------------ many thanks, - revansx
Try this:
write.table(sprintf("%10.5f%10.5f", A, B), file =
"myfile.dat",
quote = FALSE, row = FALSE, col = FALSE)
plot(1:100, 1:100, log = "xy")
grid() # only if you want a grid
?plot.default has info on the log= argument. Use ? with the other
commands to find out more about them.
On 2/6/06, Richard Evans <revans at jlab.org>
wrote:> folks,
>
> I have been struggling with the "R" documentation for too long
now and
> I need a simple answer on two questions. The documentation does not
> have adequate examples. Please help.
>
> given two equal vector lists:
> A <- c(0,1,2,3)
> B <- c(5,6,7,8)
>
> [Question #1]
> how do I dump them to a text file with the following format:
> ------------------------------------------------------------
> [line 1] 0.0000000 5.0000000
> [line 2] 1.0000000 6.0000000
> [line 3] 2.0000000 7.0000000
> [line 4] 3.0000000 8.0000000
> ------------------------------------------------------------
>
> [Question #2]
> ------------------------------------------------------------
> how do you make log-log plot that looks
> like it was plotted on log-log graph paper?
> ------------------------------------------------------------
>
> many thanks,
> - revansx
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>
Dear Richard,> -----Original Message----- > From: r-help-bounces at stat.math.ethz.ch > [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Richard Evans > Sent: Monday, February 06, 2006 4:35 PM > To: r-help at stat.math.ethz.ch > Subject: [R] novice questions about programming in "R" > > folks, > > I have been struggling with the "R" documentation for too > long now and I need a simple answer on two questions. The > documentation does not have adequate examples. Please help. > > given two equal vector lists: > A <- c(0,1,2,3) > B <- c(5,6,7,8) > > [Question #1] > how do I dump them to a text file with the following format: > ------------------------------------------------------------ > [line 1] 0.0000000 5.0000000 > [line 2] 1.0000000 6.0000000 > [line 3] 2.0000000 7.0000000 > [line 4] 3.0000000 8.0000000 > ------------------------------------------------------------One way to do this is Data <- cbind(A,B) rownames(Data) <- paste("[line ", 1:4, "]", sep="") write.table(formatC(Data, digits=7, format="f"), file="c:/temp/test.txt", col.names=FALSE, quote=FALSE) [Note that the two vectors are not lists and are not equal. If you don't really want the line numbers in the file, then omit the second command and use the argument row.names=FALSE to write.table().]> > [Question #2] > ------------------------------------------------------------ > how do you make log-log plot that looks like it was plotted > on log-log graph paper? > ------------------------------------------------------------ >plot(x, y, log="xy") [I assume that you don't want the graph-paper grid, though you could add that with abline(h=values, v=values, col="gray") if you do.] I hope this helps, John> many thanks, > - revansx > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html