First of all, in general, var <- expr evaluates the R expression expr and assigns the result to the variable var. If the statement occurs inside a function, then var becomes a function-local variable, otherwise, it becomes a global variable. c(0,0,0,1,0,1,0,1,1,1,1,0) Combines 12 double literals into a double vector in the order given. matrix(c(0,0,0,1,0,1,0,1,1,1,1,0),4,3, byrow=T … Read more
First lets make so data to experiment with set.seed(100) example <- matrix(runif(47*30), nrow = 47) example[sample(length(example), 250)] <- NA Now we can calculate our means. The apply function samples a random value from each row (!is.na excludes NA values), mean gets the mean, and replicate repeats this 10000 times. exmeans <- replicate(10000, mean(apply(example, 1, function(x) … Read more
list.files() lists all the files in a directory, use this with lapply() and read_xlsx(). In this example I set the working directory to the folder containing the files. library(readxl) files <- list.files() dat <- lapply(files, read_xlsx) dat # [[1]] # # A tibble: 1 x 3 # a a__1 a__2 # <dbl> <dbl> <dbl> # … Read more
comb <- combn(colnames(data),v) colnames(results) <- apply(comb,2,function(rows) paste0(rows, collapse = “”)) insted of paste use paste0 @henrik and @chargaff solved how paste function working in R? [duplicate]