For Data Science Learners
R for Data Science
How to Check if a Directory Exists in R, checking if a directory exists is an essential step in working with files and data. It helps to ensure that the specified directory exists and is accessible, preventing errors and unexpected behavior. In this tutorial, we will learn how to check if a directory exists in…
How to remove files and folders in R, the process of removing files and folders can be done using different functions and packages. Removing files and folders is an essential step in data cleaning and management processes. In this article, we will explain how to remove files and folders in R. How to remove files…
How to Create a Covariance Matrix in R?, In statistics, a covariance matrix is a square matrix that shows the covariance between different variables. Each element in the matrix represents the covariance between two variables. A high positive covariance indicates that the two variables tend to increase or decrease together, while a high negative covariance…
Sort Data in R With Examples, R is a powerful tool for data analysis and manipulation. Sorting data in R is a common task that involves arranging data in ascending or descending order based on one or more columns. This can be especially useful in exploratory data analysis, as it allows you to quickly identify…
KPSS Test in R, the KPSS test (Kwiatkowski-Phillips-Schmidt-Shin) is a statistical test used to determine whether a time series has a unit root or not. A unit root indicates that the time series is non-stationary, meaning that the mean and/or the variance of the series changes over time. The KPSS test is often used in…
Wald Test in R With Examples, A Wald test is a statistical test that compares the fit of two models, one nested within the other. The test involves estimating the difference between the two models, calculating the variance of that difference, and then comparing the difference to its estimated variance. In this article, we will…
Anderson-Darling Test in R, the Anderson-Darling Test is a statistical test used to determine whether a given dataset is drawn from a particular distribution, such as the normal distribution. In this article, we will demonstrate how to conduct an Anderson-Darling Test in R using inbuilt datasets. Formulation of the Hypothesis: Before conducting the Anderson-Darling Test,…
Jarque-Bera Test in R, the Jarque-Bera test is a statistical test used to determine whether a given dataset is distributed normally or not. It tests whether the skewness and kurtosis of the dataset are consistent with a normal distribution. In this article, we will demonstrate how to conduct a Jarque-Bera test in R with inbuilt…
Fisher’s exact test in R, Fisher’s exact test is a statistical test used to analyze the relationship between two categorical variables. It is used when the sample size is small and the expected counts of the contingency table are less than 5. In this article, we will demonstrate how to conduct Fisher’s exact test in…
One proportion Z Test in R, One proportion Z-Test is a statistical test that is used to determine whether the difference between observed and expected frequencies for a categorical variable is significant or due to chance. It is a hypothesis-testing method that helps researchers make inferences about a population based on a sample. In this…
