R Interview Questions

In iris dataset, there are five columns, i.e., Sepal.Length, Sepal.Width, Petal.Length, Petal.Width and Species. We will calculate the mean of Sepal-Length across different species of iris flower using the mean() function from the mosaic package. mean(iris$Sepal.Length~iris$Species) In R, you can use the aggregate function to find the mean of one column with respect to another. … Read more

This function is used to initialize the private data members while declaring the object. In R, the initialize() function is a method used in object-oriented programming (OOP) to define the behavior of an object when it is being initialized or created. This function is often associated with classes and is part of the S4 class … Read more

There are the following packages which are used for data imputation MICE missFores Mi Hmisc Amelia imputeR In R, several packages are commonly used for data imputation, depending on the specific requirements and methods preferred. Some popular packages include: mice (Multivariate Imputation by Chained Equations): This package is widely used for imputing missing data using … Read more

A vector is a series of data elements of the same basic type. The members in the vector are known as a component. The R object that contains elements of different types such as numbers, strings, vectors, or another list inside it, is known as List. A two-dimensional data structure used to bind the vectors … Read more

R is an interpreted computer programming language which was created by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand”. It is a software environment used to analyze statistical information, graphical representation, reporting, and data modeling. R is the implementation of the S programming language, which is combined with lexical scoping semantics. … Read more