[R] Flowlines from contours

Is it possible to derive flowlines from contours ? -- View this message in context: http://www.nabble.com/Flowlines-from-contours-tp25451633p25451633.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list

[R] Use of [:alnum:] or . in gsub() etc..

test = c ( AAABBB, CCC ) This works : gsub ( [A-Z], 2, test ) None of these do : gsub ( [A-Z], [:alnum:], test ) gsub ( [A-Z], [[:alnum:]], test ) gsub ( [A-Z], [:alnum:], test ) gsub ( [A-Z], [[:alnum:]], test ) gsub ( [A-Z], ^[:alnum:]$, test ) What am I doing wrong, please ? --

[R] Re ad a text file from a directory in which an R script finds itself

Is it possible for an R script to read a text file, say, from the directory in which the script is located ? I don't think I can use setwd(), because I can't specify the directory. -- View this message in context:

[R] Selecting rows that are the same in separate data frames

I want to compare two matrices or data frames and select or get an index for those rows which are the same in both. I have tried the following : a = matrix ( 1:10, ncol = 2 ) a b = matrix ( c ( 2,3,4,7,8,9 ), ncol = 2 ) b a[a==b] a = as.data.frame ( matrix ( 1:10, ncol = 2 ) ) a b

Re: [R] Selecting rows that are the same in separate data frames

of a, but to mark those rows which are also in b. If I do merge ( a,b ), I just get b. If I do merge ( a,b, all.x =TRUE), I get a. bartjoosen wrote: I'm not sure what you want, but take a look at ?merge and %in% ppaarrkk wrote: I want to compare two matrices or data frames and select

[R] Using grep() to subset lines of text

I have two vectors, a and b. b is a text file. I want to find in b those elements of a which occur at the beginning of the line in b. I have the following code, but it only returns a value for the first value in a, but I want both. Any ideas please. a = c(2,3) b = NULL b[1] = aaa 2 aaa b[2] =

Re: [R] save an object of class im

example of the commands you used. Sarah On Thu, Oct 23, 2008 at 12:26 PM, ppaarrkk [EMAIL PROTECTED] wrote: I have created various im objects, but can't seem to save and load them. I can save them, but as small files of less than 1Kb. Therefore, when they are re-loaded, they cannot

[R] save an object of class im

I have created various im objects, but can't seem to save and load them. I can save them, but as small files of less than 1Kb. Therefore, when they are re-loaded, they cannot be plotted as images. Any ideas please. Thankyou. Simon Parker Imperial College -- View this message in context:

[R] Equivalent of Excel pivot tables in R

Can somebody tell me how to do the equivalent of a pivot table in R ? For example, if I have : var1var2 var3 a x10 b y20 a z10 b z20 a z10 b z20 I could have : x y z a

[R] How do you refer to the row above in a data frame ?

You have a two-dimensional data frame. Columns is easy, say col4 - col3 - col2 How do you do row3 - row2 +1 for example. -- View this message in context: http://www.nabble.com/How-do-you-refer-to-the-row-above-in-a-data-frame---tp15336933p15336933.html Sent from the R help mailing list

Re: [R] using an element of an array as a new object

Thankyou for the replies. assign() works. for (i in 1:7) assign(filesBox[i,1],read.table(paste(dir2, filesBox[i,1], sep=), header = FALSE)) -- View this message in context: http://www.nabble.com/using-an-element-of-an-array-as-a-new-object-tp14884435p14917349.html Sent from the R help