PNG images are essentially a grid of values that represent colors to display. Since each cell in the grid is made up of numbers, I got curious about what it might mean to aggregate multiple PNGs. What would it look like to average two or more images? Median? Mode? Random?... [Read more...]

PNG images are essentially a grid of values that represent colors to display. Since each cell in the grid is made up of numbers, I got curious about what it might mean to aggregate multiple PNGs. What would it look like to average two or more images? Median?To do ... [Read more...]

Over the years I have been amazed by how many friends of mine who seem otherwise very intelligent have gotten involved in Multilevel Marketing (MLM). And, as most people who have been involved with these organizations, all of my friends involved in these organization have ended up after many hours ... [Read more...]

Over the years I have been amazed by how many friends of mine who seem otherwise very intelligent have gotten involved in Multilevel Marketing (MLM).And, as most people who have been involved with these organizations, all of my friends involved in thes... [Read more...]

In this article, I will show you how to use the k-Nearest Neighbors algorithm (kNN for short) to predict whether price of Apple stock will increase or decrease. I obtained the data from Yahoo Finance. You can download the dataset here. What is the k-Nearest Neighbors algorithm? The kNN algorithm ... [Read more...]

SummaryThis personal project was inspired by my own experience in housing market. I was wondering what I can achieve with public data and Data Science methods. Built upon extensive research of domain knowledge, my model is very simple yet powerful. It used the data with most information, followed the trends ... [Read more...]

Thanks to Dr George Esaw, I recently learned that Ross Ihaka, co-creator of R, was featured in a full-page advertisement placed in The Economist by the University of Auckland back in April: Image credit: The Economist / University of Auckland (via George Esaw) Click on the image for a larger version, ... [Read more...]

This is a quick note that may be useful for some people. I was interested in knowing how many years of monitoring we need to detect a trend. This is a long term monitoring project, so we already have 7 … Continue reading → [Read more...]

The Maungawhau volcano dataset is an R classic, often used to illustrate 3d plotting. Being on a Gaussian process kick lately, it seemed fun to try to interpolate the volcano elevation data using a subset of the full dataset as training data. Even with... [Read more...]

Scraping presidential transcripts To begin, we must scrape the content of all presidential speeches recorded in American history. To do that, I’ll rely on the very handy BeautifulSoup library, and eventually store all data in a pandas dataframe that will be persisted in a pickle file. # import required libraries ... [Read more...]

Next Friday at noon PDT I will be hosting a free webinar titled Make a Census Explorer with Shiny. You can register for it here. Space is limited, so if you are interested then I recommend that you reserve your space today. The content will be very similar to the ... [Read more...]

This is probably my shortest post ever.All my QGIS processing scripts (R and Python) and models that I already blogged about, plus some extra are now available at GitHub. [Read more...]

This is probably my shortest post ever.All my QGIS processing scripts (R and Python) and models that I already blogged about, plus some extra are now available at GitHub. [Read more...]

No code for once. This is an independent, introductory article about RStudio’s Shiny web application framework for R. This could be useful for people who don’t know what Shiny is. Or for those of you who want to find out when to use Shiny.  What does Shiny do? ... [Read more...]

by Joseph Rickert In a recent previous post, I wrote about support vector machines, the representative master algorithm of the 5th tribe of machine learning practitioners described by Pedro Domingos in his book, The Master Algorithm. Here we look into algorithms favored by the first tribe, the symbolists, who see ... [Read more...]

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In a previous post I provided “mouse-heavy” instructions for getting R running on your Mac. A few of the comments suggested that an “all Homebrew” solution may be preferable for some folks. Now, there are issues with this since getting “support” for what may be R issues will be very ... [Read more...]

I’ve been installing R Commander on laptops for our students to use in tutorials. It’s tedious to put each one online with my login, download it all, then disable the internet (so they don’t send lewd e-mails to the vice-chancellor … Continue reading → [Read more...]

Last week, we had a great course on Text Mining with R at the European Data Innovation Hub. For persons interested in text mining with R, another 1-day crash course is scheduled at the Leuven Statistics Research Center (Belgium) on November 17 (http:... [Read more...]

By Steph Locke SQL Relay is an annual conference around SQL Server and related tech. It hits six to ten cities in the space of a fortnight, touring the country offering free and awesome training on SQL Server, Business Intelligence … Continue reading → [Read more...]