PCA means Principal Component Analysis. PCA is a multivariate technique that is used to reduce the dimension of a data set. More precisely, PCA is concerned with explaining the variance-covariance structure through a few linear combinations of the original variables.… The post Principal Component Analysis (PCA) using R appeared first ...

Error in as.Date.numeric(13131) : ‘origin’ must be supplied, This article will show you how to handle the error message in as. Date.numeric(X). Approach 1: Error in as.Date.numeric(13131) : ‘origin’ must be supplied This ...

calmcode.io is an e-learning platform that I really really really recommend to programmers and data scientists: It is free. It involves open source tools. It uses bite-sized tutorial videos. It explains tools clearly. It explains everything calmly. There’s tons of content about computer programming, data science, and personal ...

Quantargo Workspace Now Out of Beta We’re thrilled to announce that Quantargo Workspace is now out of Beta and generally available! Quantargo Workspace lets you easily create and manage data science projects using R and Python, with advanced features ...

Last week, a paper started making the Twitter rounds. Selective attention in hypothesis-driven data analysis by Professors Itai Yanai and Martin Lerche looked into whether providing specific hypotheses prevented students from fully exploring a...

Whether you want to do, share, teach, or learn data science, RStudio Cloud is a cloud-based solution that allows you to do so online. The RStudio Cloud team has rolled out new features and improvements since our last post in May 2021. So what’s new? C...

I am thrilled to share that my article “Bringing the World to the Classroom: Teaching Statistics and Programming in a Project-Based Setting” is published in PS: Political Science and Politics as an open-access article. I set up and tested ...

Way back in 2018, long before the pandemic, I described a soon-to-be implemented simstudy function genMultiFac that facilitates the generation of multi-factorial study data. I followed up that post with a description of how we can use these types of efficient designs to answer multiple questions in the context of a ...

Apache Parquet is a popular column storage file format used by Hadoop systems, such as Pig, Spark, and Hive. The file format is language independent and has a binary representation. Parquet is used to efficiently store large data sets and has the extension .parquet. This blog post aims to understand ...

An interesting case on X validated of someone puzzled by the simulation (and variance) of the random variable 1/X when being able to simulate X. And being surprised at the variance of the ratio being way larger than the variances of both numerator and ...

Whether you’re just starting your journey to developing a successful app or riding a wave of adoption, it’s a good idea to build durable R code. Projects that are built with durable code are built to adapt.  Having well-thought-out coding practices in place doesn’t prevent the challenges ...