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Hello, I have a vector (numeric) v-> c(a,b,c,d,e) and I want to create the vector n->c(b-a,c-b,d-c,e-d). How can I do that? Thank you Hermann [[alternative HTML version deleted]]

...umi package that depends obviously on hdrcde that is not available for r 2.12.1. I did not find instructions to solve or circumvent this problem. Installing hdrcde by hand did not work either. It was not detected by > (.packages(all.available=TRUE)) if installed in the R library. Thanks Hermann Norpois This was my try to install the lumi package: > source ("http://bioconductur.org/biocLite.R") Fehler in file(filenaReme, "r", encoding = encoding) : kann Verbindung nicht öffnen Zusätzlich: Warnmeldung: In file(filename, "r", encoding = encoding) : kann 'b...

Hello, I wish to count how often zero (0) appears in the vector test. test [1] 1 1 1 1 1 1 2 1 1 1 0 2 0 1 1 0 0 0 1 1 1 0 1 2 1 1 1 1 1 1 I think of something like ... > sapply (test, function (x) if (x==0 ... ... but actually I dont know how to carry on. Could anybody give me a hint? Thanks Hermann [[alternative HTML version deleted]]

Hello, I would like to transform a character vector into a "binary" vector ("keine" and " " become 0 and the rest 1). > dput (scm) c("keine", " ", "keine", "Erstgradverw.", "Mutter", "Erstgradverw.", "Erstgradverw.", "keine", " ", "Vater",

...# or attr(mydata, 'fc') # it does not work if I include return fc or attr... in my function neither Then I can get access to newdata and on but not on fc or attr(mydata, 'fc'). Is there a possibility to use function and having access to attr AND newdata? Thanks Sincerely Hermann Norpois [[alternative HTML version deleted]]

...), end = c(5291926L, 10988526L, 11768676L, 11841851L, 12268076L, 12277051L), peak = c(8L, 7L, 8L, 8L, 12L, 7L)), .Names = c("chrom", "start", "end", "peak" ), row.names = c(NA, -6L), class = "data.frame") > Thanks for some instructions. Hermann Norpois [[alternative HTML version deleted]]

Hello, I have a list with gene names, fold changes (=expression level) and chromosomes. Names fold change chromosome hz 1.5 2 If I plot fold change versus chromosome (or vice versa): plot (ch, fc) I see only the chromosomes with numbers but not those with letter (x and y). What can I do? A second question: How can I add a single line in that plot at a certain

Hello, I did a pca with over 200000 snps for 340 observations (ids). If I plot the eigenvectors (called rotation in prcomp) 2,3 and 4 (e.g. plot (rotation[,2]) I see a strange "column" in my data (see attachment). I suggest it is an artefact (but of what?). Suggestion: I used prcomp this way: prcomp (mat), where mat is a matrix with the column means already substracted followed by a

Hello, having a data frame like test with pairs of characters I would like to create chains. For instance from the pairs A/B and B/I you get the vector A B I. It is like jumping from one pair to the next related pair. So for my example test you should get: A B F G H I C F I K D L M N O P > test V1 V2 1 A B 2 A F 3 A G 4 A H 5 B F 6 B I 7 C F 8 C I 9 C K 10 D L

Hello, I have start and end coordinates from different experiments (DNase hypersensitivity data) and now I would like to combine overlapping intervals. For instance (see my test data below) (2) 30-52 and (3) 49-101 are combined to 30-101. But 49-101 and 70-103 would not be combined because they are on different chromosomes (chr a and chr b). Does anybody have an idea? Thanks Hermann > df

Hello, my data is sorted by start.ens (see below). And now I would like to extract all rows (so called* defined row*s) with type==Expression - subset (df, type==Expression) - and the aforegoing type==DNase HS (which is not necessarly row n-1 - assumung that the defined row is n). I dont know how to add this to my subset command. Is that possible? Thanks Hermann > df start.ens fc.trans

Hello, I open some files in a directory and get a list. open.list <- sapply (namen, function (x) {file <- list.files (ddir, pattern=x, full.names=TRUE) # namen is vector and each element detects a special file to open file <- read.table (file) } ) This list has no names. I would like to get a list with key/value