The rbind() function in R, short for row-bind, “combines vectors, matrices, and data frames by rows“. Syntax rbind(input_data, data_to_bind) Parameters The input_data is input data. The data_to_bind is the data that needs to be bound. Visual representation Example 1: Rbind vectors into a matrix You can use the rbind() function in R to “combine vectors into a matrix by … Read more
The cbind, short for column bind in R, is a function “used to combine specified Vector, Matrix or Data Frame by columns”. Syntax cbind(a1, a2, …, deparse.level = 1) Parameters a1, a2: It is a vector, matrix, and data frame. deparse.level: This value determines how the column names are generated. The default value of the deparse.level is … Read more
To append data frames in R, you can use the “rbind()” or “nrow()” function. Method 1: Using the rbind() function The easiest way to append data frames in R is to the “rbind()” function. The “rbind()” function appends all records from the second data frame at the end of the first data frame. Syntax rbind(a, b) Parameters … Read more
The colSums() function in R is “used to calculate the sum of each column in a data frame or matrix”. Syntax colSums(x, na.rm = FALSE) Parameters x: It is an array of two or more dimensions containing numeric, complex, integer, or logical values or a numeric data frame. na.rm: It is logical. Should missing values … Read more
The rowMeans() function in R “calculates the mean of each row of a data frame or matrix”. Syntax rowMeans(x, na.rm = FALSE) Parameters x: It is an array of two or more dimensions containing numeric, complex, integer, or logical values or a numeric data frame. na.rm: It is a logical argument. If TRUE, NA values … Read more
The colMeans() is a built-in R function that “calculates the mean of several columns of a data frame or matrix”. Syntax colMeans(x, na.rm = FALSE) Parameters x: It is an array of two or more dimensions containing numeric, complex, integer, or logical values or a numeric data frame. na.rm: It is a logical argument. If … Read more
The rowSums() function in R is “used to calculate the sum of rows of a data frame or matrix”. This function has rowSums(x, na.rm=FALSE) syntax, where x is the name of the matrix or data frame, and na.rm is whether to ignore NA values. The default is FALSE. Syntax rowSums(x, na.rm=FALSE) Parameters x: It is the … Read more
The sample() function in R “takes a sample of the specified size from the dataset or a vector either with or without replacement“. For example, the sample(1:10, 5) function returns 5 random numbers between 1 and 10. Syntax sample(data, size, replace = FALSE, prob = NULL) Parameters Data: It is either a vector of one or more elements … Read more
The tryCatch() function in R “returns the value of some expression or produces a custom message if a warning or error occurs“. For example, tryCatch(log(“a”), error = function(e) print(“Error!”)) prints “Error!” instead of stopping the program. Syntax result = tryCatch({ expression }, warning = function(w) { warning-handler-code }, error = function(e) { error-handler-code }, finally = … Read more
The grep() is a built-in R function that “checks for matches of characters or sequences of characters in a given string”. Syntax grep(pattern, x, ignore.case = FALSE, value = FALSE) Arguments pattern: It takes a character string containing a regular expression (or character string for fixed = TRUE) to match the given character vector. x: It … Read more