The nzchar() is a built-in R function that tests whether elements of a character vector are non-empty strings. Syntax nzchar(x) Parameters The nzchar() function takes the character vector x as a parameter. Return Value It returns the boolean value either TRUE or FALSE. Example Let’s define a character vector and test whether the vectors’ elements … Read more
The casefold() is a built-in R function that is a generalized solution to convert to either lowercase or uppercase letters. It converts a character vector to upper or lower case, depending on the value of the parameter upper. If you pass upper = FALSE, it will convert to lowercase letters; if you pass upper = … Read more
To split each character of a string in R, you can use the strsplit() function and pass an empty string as a delimiter, which will split each character. E.g., the strsplit(string, split=””) function returns each string character. Example rs <- (“This12is3First4R5String6Example”) strsplit(rs, split = “”) Output [1] “T” “h” “i” “s” “1” “2” “i” “s” … Read more
To calculate the average of a data frame column in R, use the mean() function. The mean() function takes the column name as an argument and calculates the mean value of that column. To create a data frame, use the data.frame() function. df <- data.frame(a1 = 1:3, a2 = 4:6, a3 = 7:9) df cat(“The … Read more
To calculate an average of a list in R, use the sapply() and mean() functions. The sapply() function applies a function to all the elements of the list. To create a list in R, use the list() function. To create a Vector in R, use the c() function or colon operator. Example 1 pedro <- … Read more
To change the date formats in R, use the format() function. For example, if you want to get the date than the standard %Y-%m-%d, use the format() function from the base package. dates <- c(“11/20/80”, “11/20/91”, “11/20/1993”, “09/10/93”) dt <- as.Date(dates, “%m/%d/%y”) dt cat(“After formatting a date in other format”, “\n”) fmt <- format(dt, “%a %b … Read more
To convert a Date to a Character in R, use the as.Character() function. dates <- c(“11/20/80”, “11/20/91”, “11/20/1993”, “09/10/93”) dt <- as.Date(dates, “%m/%d/%y”) strDates <- as.character(dt) strDates Output [1] “1980-11-20” “1991-11-20” “2019-11-20” “1993-09-10” In the above code example, you convert a character vector of dates to a Date object using the as.The date () function … Read more
To get today’s date in R, use the Sys.Date() function. Sys.Date() Output [1] “2021-03-11” To get the current date and time in R, use the date() function. date() Output [1] “Thu Mar 11 16:59:16 2021” Dates can be imported from character, numeric, POSIXlt, and POSIXct formats in R using as.Date() method. That’s it. Krunal LathiyaKrunal … Read more
There are the following methods to combine strings in R. Using the paste() function: It combines or concatenates two or more strings. Using the cat() function: It concatenates and prints the combined strings in the console. Using the paste0() function: It concatenates the strings without any separator. Using str_c() function: It combines multiple strings into … Read more
There are the following methods to find a character in a string in R. Method 1: Using the grepl() function Method 2: Using grep() function Method 3: Using the gregexpr() function Method 1: Using the grepl() function Use the grepl() function to check if characters are present in the string. If it is present in … Read more