search for: rownames

Hi, My first post here and new to R so please bear with me (long time programmer though, helping a friend with some scripts). I've noticed a behaviour when using rownames() that I think is odd, wondering if I'm doing something wrong. To illustrate, say I create a very simple matrix (called fred): fred<-matrix(,4,2) It looks like this: [,1] [,2] [1,] NA NA [2,] NA NA [3,] NA NA [4,] NA NA If I now try and set a row name for one of the...

Hello R-users and developers, Once again, I'm asking for your help. There is other way to do the same more easily for applied simultaneous grep??? c<-subset(c,!rownames(c) %in% grep(".1",rownames(c),value=T)) c<-subset(c,!rownames(c) %in% grep(".5",rownames(c),value=T)) c<-subset(c,!rownames(c) %in% grep(".6",rownames(c),value=T)) c<-subset(c,!rownames(c) %in% grep(".99999",rownames(c),value=T)) Thanks...

I noticed something surprising (in R 2.2.1 on WinXP) According to the documentation, rownames and colnames are character vectors. Assigning a vector of class POSIXct or POSIXlt as rownames or colnames therefore is not strictly according to the rules. In some cases, R performs a reasonable typecast, but in some other cases where the same typecast also would be possible, it does not. Assigni...

I noticed something surprising (in R 2.2.1 on WinXP) According to the documentation, rownames and colnames are character vectors. Assigning a vector of class POSIXct or POSIXlt as rownames or colnames therefore is not strictly according to the rules. In some cases, R performs a reasonable typecast, but in some other cases where the same typecast also would be possible, it does not. Assigni...

Hi all, I think this might be an easy one but I cannot think of a way to do this other than what I am currently attempting. I simply want to sort my data frame's rownames by a defined vector so that the plots I generate from that vector are in the desired order Consider the test data below: #Create test data DataToPlot.. <- data.frame("Location1" = c(100,200),"Location2" = c(200,400)) #Name rowns rownames(DataToPlot..) <- c("Fal...

Dear R users, I am trying to extract the rownames of a data set for which each columns meet a certain criteria. (condition - elements of each column to be equal 1) I have the correct result, however I am seeking for more efficient (desire vectorization) way in implementing such problem as it can get quite messy if there are hundreds of columns....

Hi I want to extract rows of a matrix, and preserve rownames even if only one row is selected. Toy example: R> a <- matrix(1:9,3,3) R> rownames(a) <- letters[1:3] R> colnames(a) <- LETTERS[1:3] R> a A B C a 1 4 7 b 2 5 8 c 3 6 9 Extract the first two rows: R> wanted <- 1:2 R> a[wanted,] A B C a 1 4 7 b 2 5 8 rownames...

...t allowed In addition: Warning message: non-unique values when setting 'row.names': ?1?, ?10?, ?2?, ?3?, ?4?, ?5?, ?6?, ?7?, ?8?, ?9? -- Looking at the code of rbind.data.frame, the error comes from the lines: -- xij <- xi[[j]] if (has.dim[jj]) { value[[jj]][ri, ] <- xij rownames(value[[jj]])[ri] <- rownames(xij) # <-- problem is here } -- if the rownames() line is dropped, all works well. What this line tries to do is to join the rownames of internal elements of the data.frames I try to rbind. So the result, in my case should have a column 'a',...

Hi all I was wondering whether there has ever been an update on the rownames and colnames behaviour as described by Eric below? I still get the same behaviour, exactly as described by Eric, on my WinXP installation of R-2.3.0. I also posted a message to r-help on Friday but looking through the online archives it seems to have not made it to the list. I would agree with E...

I am getting an error message, which I do not know the source to. I have a matrix SAMPLES that has preexisting rownames that I would like to change. GENE_NAMES contains these rownames. > rownames(SAMPLES) = GENE_NAMES Error in "dimnames<-.data.frame"(`*tmp*`, value = list(list(V1 = c(3843, : invalid 'dimnames' given for data frame > dim(SAMPLES) [1] 12626 20 > dim(GENE_NAM...

Hi, I am trying to match the order of the rownames of a dataframe with the rownames of another dataframe (I can't simply sort both sets because I would have to change the order of many other connected datasets if I did that): Also, the second dataset (snp.matrix$fam) is a snp matrix slot: so for example: data_one:...

...uot;. In performing a logistic regression of the data, and making the diagnostic plots (R-2.5.0) data(plasma,package='HSAUR') plasma_1<- glm(ESR ~ fibrinogen * globulin, data=plasma, family=binomial()) layout(matrix(1:4,nrow=2)) plot(plasma_1) I find that data points corresponding to rownames 17 and 23 are outliers and high leverage. I would then like to perform a fit without these two rows. In principle this should be easy, using an update() with subset=-c(17,23). The problem is that the rownames in this dataset are not ordered, and, in fact, the relevant rows are 30 and 31, not 1...

I find one row in my large dataset. But when I use the "rownames" for the data on the 100,000 row, the result show nothing. I try it by the following example, it still likes that. > tst[rownames(tst)==100000,] [1] x y <0 rows> (or 0-length row.names) ############## > tst=data.frame(x=1:200000,y=200000:1) > tst[rownames(tst)==1,] x y...

Hi guys, I am using the blp() function from RBloomberg package which returns a matrix of prices with the columns corresponding to the security name and the columns to the date. When I have a look at the matrix I can see the rownames (dates) on the left of the prices but when I call the rownames() function it returns me a NULL value. It worked perfectly until I had to reinstall the RBloomberg package. Here is my code: (you need to be connected to bloomberg to run it): conn <- blpConnect(na.action="na") prices <-...

Is there a way to use the cycle variable for rowname? v=1:6 for (a in 1:3){ for (b in 4:5) { v=rbind(v,a.b=1) } } v This above obviously does not work, but I couldn't find out how to use a and b to construct a rowname like 14, 15, 24, 25. Thanks for the help. Balazs -- View this message in context: http://www.nabble.com/using-for-variable-as-rowname-tp19533203p19533203.html Sent from

...I have a vector, let's say for example int <- sample(1:20,10); for now: now I have a matrix... M = m x n where the first column is a "feature" column and most likely shares at least one of the int (interesting) numbers. I want to extract the rows where int[] = M[,1] I thought: rownames(int)<-int; rownames(M)<-M[,1]; M[rownames(int),] would work, but it doesn't... (I assume because I have rownames(int) that are not found in M[,1]. Neither does, rownames(M)==rownames(int)... Any help would be greatly appreciated! Thank you! [[alternative HTML version deleted]]

Hi Dimtris and esteemed useRs, I don't understand why i get this error message when attempting to use merge() - > temp <- merge(x, y[,17, drop=FALSE], by=rownames, sort=FALSE) Error in as.vector(x, mode) : cannot coerce type 'closure' to vector of type 'any' It should work because: > all(rownames(x[order(rownames(x)),]) == + rownames(y[order(rownames(y[,17, drop=FALSE])),17, drop=FALSE]) .... [TRUNCATED] [1] TRUE also: > class...

Hi, I am working on some microarray data, and have some problems with writing iterations. In essence, the problem is that objects with three dimensions don't have rownames and colnames. These colnames and rownames would otherwise still be there in 2 dimensional objects. I need to generate multiple iterations of a 2 means-clustering algorithm, and these objects thus probably need 3 dimensions. My scripts are all written with heavy references to matching of colnames...

...a matrix that contains 4 replicates of each rowname. (4 a's, 4 b's, 4 c's in no particular order) Like this: # c 32 a 1 b 4 c 87 c 34 b 54 a 23 a 12 b 9 a 3 b 87 c 43 There are a couple of more columns but I'm using the above as an example I need to sort it so that the same rownames appear together in alpahbetical order. Like this: # a 1 a 23 a 12 a 3 b 4 b 54 b 9 b 87 c 87 c 34 c 43 c 32 The code I came up with is something like this: mat <- mat[sort(rownames(mat)), ] This doesn't work though, it returns the same value for each row each time, something like this...

...sting before publishing it. Please note that the code was developed under R 1.6.2 and might need porting to R 2.4.1 . Best regards Jens Oehlschl?gel # -- output of max.col under 2.4.1. ------------------------ > x <- rbind(c(1,1), c(0,0), c(-Inf, 0), c(0, Inf), c(0, NA), c(NA, 0)) > rownames(x) <- paste("c(", apply(x, 1, paste, collapse=","), ")") > x [,1] [,2] c( 1,1 ) 1 1 c( 0,0 ) 0 0 c( -Inf,0 ) -Inf 0 c( 0,Inf ) 0 Inf c( 0,NA ) 0 NA c( NA,0 ) NA 0 > > cat("ties not broken for c(0,0)\...