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Hi there, I just find a fancy plot like the following: http://www.nature.com/nature/journal/v505/n7481/images_article/nature12784-f2.jpg I am wondering how to plot something like that in R. Which package will be convenient...

Hi there, In the following code snippet, # a <- strptime("121114 0510", "%m%d%y %H%M") b <- data.frame(date = a, res = 1:5) class(a) class(b[1,1]) # I am wondering why the class of a and b...

Hi there, Don't know if the subject is reasonable. In the model I am trying to solve have a function like: Pi = a * dPhi/dt + b * dAlpha/dt + c dPhi/dt = .... dAlpha/dt = .... I don't know how to...

Hi there, I happened to find the expression(!abc) produces !(abc) when I used plotmath in a text annotation. Here is the mini-example. > plot(1, type = "n") > text(1,1, expression(!abc)) I don't find "!" in plotmath document...

Hi there, I happened to find the following code can generate a data frame with same column name. > x <- data.frame(a=c(1,2,3)) > y <- data.frame(a=c(2,3,4)) > z <- cbind(x,y) However, in...

Hi there, In the following example, sd() can be applied to a character vector. However, mean() can not be run in a similar way. Why? I have read sd() man page, however, I don't find information about that behavior...

Hi there, I have filed a bug report at: https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=14326. And the related patch is at: https://bugs.r-project.org/bugzilla3/attachment.cgi?id=1113 which will do: 1...

Tom La Bone wrote: > There appears to be a very promising response surface package being discussed > at useR-2008, but I have been unable to find the package on CRAN or contact > the authors. > > www.statistik.uni-dortmund.de/useR...

Hi there, I have a matrix similar as: M <- matrix(c(2,2,rep(1,12), 2), nrow = 5,byrow = FALSE) I hope to get the border subscript of the block with value 1. In the above example, I hope...

Hi there, I have established a model. I set the times to a enough long period, so that the model runs into steady state. After the model reaching steady, I hope to change a or several parameters and run the...

Hi there, I hope to build a model Y ~ X1 + X2 + X3 + X4 with X1 has two instrumental variable A and B, and X2 has one instrumental variable A. I have searched the R site and mailling list, and known...

Hi there, I have a large/huge text file. I need to locate a line in the file with a specific string, for example, "Data Points". Now, I use the following code to do: df <- readLines(file) l <- grep("Data...

On 2011-12-11 22:49, Bert Gunter wrote: > Inline below. > -- Bert > > Graph the data sensibly to figure out what's going on. Statistical > machinationsand anova tables with P values alone are not sufficient > and can be opaque or misleading...

Dear John, Thank you very much for your response. I made a mistake for my careless. I used the same data in Excel, and regressed x on y, and got a different equation, and then compared it to what I...

Hi there, I plot a simple plot with the following code: plot (rnorm(1:10), type = "b") legend("top", "test", lty = 1, pch = 21) The result is something wired for the line crosses the point in the legend while the...

Hi there, I have read the help page of nls(), there is lower or upper for defining the bounds of parameters. For example, nls(y ~ 1-a*exp(-k1*x)-(1-a)*exp(-k2*x), data=data.1, start=list...

Hi there, I hope to give a different offset for each label in a complex plot. However, the following code does not work. > plot(1:4) > text(c(1:4), letters[1:4], pos = c(4,3,2,1), offset...

Hi all, By default, MetaPost passes all text through TeX. This has the advantage of allowing essentially any TeX symbols in titles and labels. It give us, who use the multibyte character in ordinary communication, much convenience. Gnuplot has fulfilled...

On 2012-04-03 20:03, Rmh wrote: > yes. See ?glht in the multcomp package, and the examples using glht in ?MMC in the HH package. > > Sent from my iPhone > Thank you very much for the clues. However, I can...

Hi there, When I started R by double clicking on Rgui icon (I am on Windows), the tempdir() returned the tmpdir in the directory I set in .Renviron. If I started R by double clicking on a *.RData file, the...