How to Check If Characters are Present in String in R

3 Ways to Find Character in String in R

To check if characters are present in the R string, you can use the “grepl()” function. The “grepl()” function returns TRUE if the specified sequence of characters is present in the string and FALSE if the specified sequence of characters is not present in the string. string_first <- “TheLastOfUs” value_first <- “L” grepl(value_first, string_first) value_second … Read more

How to Create an Empty data frame in R

How to Create Empty DataFrame in R

To create an empty data frame in R, “specify the column names and set the number of rows to 0 using the data.frame() function”. df <- data.frame(name = character(0), address = character(0), date = as.Date(character(0)), stringsAsFactors = FALSE) str(df) Output ‘data.frame’: 0 obs. of 3 variables: $ date: ‘Date’ num(0) $ file: chr $ user: … Read more

R If else Statement (With Examples)

If else in R

The if else statement in R “evaluates a condition and executes different statements based on whether the condition is TRUE or FALSE”. Syntax if (condition) { expression A } else { expression B } Here, the “condition” is an expression that evaluates to TRUE or FALSE. If the condition is TRUE, the code within the first … Read more

R Operators: Arithmetic, Relational, Logical, Assignment

R Operators - Arithmetic, Relational, Logical, Assignment

An operator in R is a symbol that tells the compiler to perform a mathematical or logical operation. Types of operators Arithmetic Operators Relational Operators Logical Operators Assignment Operators Miscellaneous Operators Arithmetic Operators in R Add(+) operator in R To add two vectors, you can use the “+ operator”. a <- c(1, 2, 3) b … Read more

Pi in R Tutorial with Example

How to Calculate Pi in R with Example

Pi is a built-in R constant whose value is 3.141593. The pi constant is the ratio of the circumference of a circle to its diameter. When you define a pi, please note that p of pi is in lowercase. Syntax pi Example print(pi) Output [1] 3.141593 The value of the pi constant in R is … Read more