Permutations in R
During the interview process for Data Science positions, it is likely to be asked to calculate Combinations or Permutations. Today ... Read morePermutations in R
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Articles by George Pipis
Covid19: Correlation Between Confirmed Cases and Deaths
What is the daily correlation of Confirmed versus Death Cases in Covid-19. In other words, the people who have passed ... Read moreCovid19: Correlation Between Confirmed Cases and Deaths
How to Backtest your Crypto Trading Strategies in R
Few words about Trading Strategies One of the biggest challenges is to predict the Market. Many people have developed their ... Read moreHow to Backtest your Crypto Trading Strategies in R
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Interview questions about Stats and Probabilities
For Data Science positions, during the interview process, is common to ask questions about Statistics and Probabilities. We will provide ... Read moreInterview questions about Stats and Probabilities
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Avoid apply() function in large datasets
When we are dealing with large datasets and there is a need to calculate some values like the row/column min/max/rank/mean ... Read moreAvoid apply() function in large datasets
R Exercises – Interview Questions (Stats and Simulation)
For Data Science positions that require some knowledge of Statistics and Programming skills, is common to ask questions like those ... Read moreR Exercises – Interview Questions (Stats and Simulation)
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How to get Cryptocurrency prices in R
Today, we will show how you can easily get the Cryptocurrency Prices using R. We will work with the crypto ... Read moreHow to get Cryptocurrency prices in R
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How to Apply Text Distances and Fuzzy Joins
Edit Distance for measuring the Text Distance Today we will talk about text similarities and how we can “calculate” a ... Read moreHow to Apply Text Distances and Fuzzy Joins
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How to build Stacked Ensemble Models in R
At this post, we will show you how you easily apply Stacked Ensemble Models in R using the H2O package. ... Read moreHow to build Stacked Ensemble Models in R
How to determine the number of Clusters for K-Means in R
We will work with the Breast Cancer Wisconsin dataset, where we will apply the K-Means algorithm to the individual’s features ignoring the ... Read moreHow to determine the number of Clusters for K-Means in R
R: How To Assign Values Based On Multiple Conditions Of Different Columns
In the previous post, we showed how we can assign values in Pandas Data Frames based on multiple conditions of ... Read moreR: How To Assign Values Based On Multiple Conditions Of Different Columns
How to Impute Missing Values in R
In the real data world, it is quite common to deal with Missing Values (known as NAs). Sometimes, there is ... Read moreHow to Impute Missing Values in R
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Web Scraping worldometers for Coronavirus
One of the most popular web pages about Covid-19 is the worldometers which provides a detailed report about Coronavirus cases ... Read moreWeb Scraping worldometers for Coronavirus
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Report Coronavirus (COVID-19) in R
This post is about COVID-19 and we will an example of how you can get the data of the daily ... Read moreReport Coronavirus (COVID-19) in R
How to apply the Mann-Whitney U Test in R
In statistics, the Mann–Whitney U test (also called Wilcoxon rank-sum test) is a nonparametric test of the null hypothesis that ... Read moreHow to apply the Mann-Whitney U Test in R
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