search for: mat1,1

HI Eliza, You could do this: set.seed(15) mat1<-matrix(sample(1:800,124*12,replace=TRUE),nrow=12) # smaller dataset #Your codes ?list1<-list() ?for(i in 1:ncol(mat1)){ ? list1[[i]]<-t(apply(mat1,1,function(x) x[i]-x)) ? list1} ?x<-list1?? x<-matrix(unlist(x),nrow=12) x<-abs(x) ?y<-colSums(x, na.rm=FALSE) z<-matrix(y,nco...

Dear useRs, I have a matrix with 38 columns and 365 rows. what i want to do is the following..... 1. subtracting from each column, first itself and then all the remaining columns. More precisely, from column number 1, i will first subtract itself(column 1) and then the remaining 37 columns. Afterwards i will take column number 2 and do the same. In this way i want to proceed till 38th column.

...a <- c(3,5,3,6,4, 0) dogb <- c(2,4,6,8,10, 12) rata <- c (NA, 9, 9, 8, 9, 8) ratb <- c( 1,2,3,4,5,6) bata <- c( 12, 42,NA, 45, 32, 54) batb <- c( 13, 15, 17,19,21,23) id <- c('a', 'b', 'b', 'c', 'a', 'b') site <- c(1,1,4,4,1,4) mat1 <- cbind(cata, catb, doga, dogb, rata, ratb, bata, batb) data1 <- data.frame(site, id, mat1) attach(data1) data1 aa <- which(names(data1)=="rata") bb <- length(names(data1)) mat1 <- as.matrix(data1[,aa:bb]) food <- apply( mat1, 1, sum , na.rm=T) food abba <- data....

Dear all, maybe a simple problem but I found no solution for my problem. I have a matrix Y with 23 000 rows and 220 colums. The entries are "A", "B" or "C". I want to extract all rows (as a matrix ) of the matrix Y where all entries of a row are (for example) "A". Is there any solution? I tried the stringr- package but i doesn't work out. All the best

Dear list, I was curious how to subtract a vector from matrix? Say, I have mat <- matrix(1:40, nrow=20, ncol=2) x <-c(1,2) I want, x-mat[1,] and x-mat[2,], and so on... Basically, subtract column elements of x against column elements in mat. But x-mat won't do it. Thanks, Mike [[alternative HTML version deleted]]

...2.2857143 1.9047619 1.9047619 2.2857143 2.2857143 #[15] 2.2857143 1.9523810 1.9523810 2.2857143 2.2857143 2.2857143 2.2857143 #[22] 1.6190476 1.6190476 1.9047619 1.9047619 1.9047619 1.9047619 1.8095238 #[29] 0.9047619 0.9047619 1.1428571 1.1428571 1.1428571 1.1428571 1.0000000 #[36] 0.4761905 #or mat1<-matrix(((val-rep(meansb79,each=5))^2/6),ncol=5,byrow=TRUE) diag(t(apply(tb,1,function(x) x))%*% apply(mat1,1,function(x) x)) # [1] 1.4761905 1.9047619 1.9047619 1.9047619 1.9047619 2.2857143 1.9047619 ?#[8] 1.9047619 2.2857143 2.2857143 1.9047619 1.9047619 2.2857143 2.2857143 #[15] 2.2857143 1...

I have a matrix of 5 columns and 64 rows, let's call it "mat1". All values are 1 or 0. I need to take the values of the elements by row and create a single numeric element that can be placed its respective slot in a 64-element list, named "list1". For example, mat1[11,1:5] = 0,1,1,0,1 and I must put 01101, with a length of 1, into the 11th e...