What is the which function in R?

The which() function in R programming. The which() function in R returns the position or the index of the value which satisfies the given condition. The Which() function in R gives you the position of the value in a logical vector. The position can be of anything like rows, columns and even vector as well.

What is an R statement?

It is one of the easiest decision-making statements. It is used to decide whether a certain statement or block of statements will be executed or not i.e if a certain condition is true then a block of statement is executed otherwise not. Syntax: if (expression) { #statement to execute if condition is true }

How do you do if statements in R?

Adding the else Statement in R To generalize, if-else in R needs three arguments: A statement (e.g. comparison operator) that evaluates to TRUE or FALSE. The value that R should return if the comparison operator is TRUE. The value that R should return if the comparison operator is FALSE.

Which function with multiple conditions in R?

Method 1: Using indexing method and which() function Multiple conditions can also be combined using which() method in R. The which() function in R returns the position of the value which satisfies the given condition. The %in% operator is used to check a value in the vector specified.

What does && mean in R?

logical
& and && indicate logical AND and | and || indicate logical OR. The shorter form performs elementwise comparisons in much the same way as arithmetic operators. The longer form evaluates left to right examining only the first element of each vector. Evaluation proceeds only until the result is determined.

Which function is used to install the package in R?

library
R packages are installed in a directory called library. The R function . libPaths() can be used to get the path to the library.

Is else if in R?

R if else elseif Statement

if Statement: use it to execute a block of code, if a specified condition is true.
else Statement: use it to execute a block of code, if the same condition is false.
else if Statement: use it to specify a new condition to test, if the first condition is false.

What’s the difference between & and && in R?

& and && indicate logical AND and | and || indicate logical OR. The shorter form performs elementwise comparisons in much the same way as arithmetic operators. The longer form evaluates left to right examining only the first element of each vector. Evaluation proceeds only until the result is determined.

When do you use which function in R?

In other words, which () function in R returns the position or index of value when it satisfies the specified condition. which () function gives you the position of elements of a logical vector that are TRUE. It can be a row number or column number or position in a vector. Lets see an example for each Which function for vector

How to write or condition inside which in R-Stack Overflow?

Remember to fully qualify the names of the variables you are selecting, as iris$Species in the example at hand (and not only Species ). Have a look at the documentation here. Also notice that whatever you do with which can be generally done otherwise in a faster and better way. Thanks for contributing an answer to Stack Overflow!

Which is function in are you R-bloggers?

Want to share your content on R-bloggers? click here if you have a blog, or here if you don’t. The which () function will return the position of the elements (i.e., row number/column number/array index) in a logical vector which are TRUE.

Is the syntax correct in R-Stack Overflow?

Otherwise, there is no problem with that statement, the syntax is correct: does work. Remember to fully qualify the names of the variables you are selecting, as iris$Species in the example at hand (and not only Species ). Have a look at the documentation here.

What is the which function in R?