Finally got my hands on to the physical copy of the amazing Introduction to Statistical Learning with Applications in R (ISLR), Second Edition by Gareth James, Daniela Witten, Trevor Hastie, Rob Tibshirani . And it felt good to donate the first version to a local library. In this post, we learn how to use SVD,… Continue reading Imputing missing values with SVD
Category: R Tips
14 Tips to Work with Dates in tidyverse
In this quick post we will see 14 simple tips that will help get started dealing with date as variable instead of a string. We will see tips on how to create a date variable in few different ways and get components of date variable using the R package lubdridate. The R package lubdridate was… Continue reading 14 Tips to Work with Dates in tidyverse
6 Tips to change column positions with dplyr’s relocate()
Sometimes you want to change the order of columns in a dataframe. dpyr’s relocate() function makes it easy to move one or more columns to new positions easily by using the same syntax as select() function. In this post we will see 7 tips to change column order or column position using dplyr’s relocate(). Let… Continue reading 6 Tips to change column positions with dplyr’s relocate()
6 Dimensionality Reduction Techniques in R (with Examples)
Dimension Reduction techniques are one of the most useful methods in unsupervised learning of high dimensional datasets. In this post, we will learn how to use R to perform 6 most commonly used dimensionality reduction techniques, PCA: Principal Component Analysis SVD: Singular Value Decomposition ICA: Independent Component Analysis NMF: Non-negative Matrix Factorization tSNE UMAP We… Continue reading 6 Dimensionality Reduction Techniques in R (with Examples)
13 Tips to Randomly Select Rows with tidyverse
In this post, we will learn how to randomly sample rows from a data frame that is useful in most common scenarios. Tidyverse has a few options to randomly sample rows from a dataframe. slice_sample() in dplyr is the currently recommended function to use for randomly select rows. The older function in dplyr, sample_n(), for… Continue reading 13 Tips to Randomly Select Rows with tidyverse