In 2014, EPA documented the relative lack of nutrient data from waste water treatment plant effluents, even though development of surface water quality standards for nitrogen and phosphorus has been a stated priority for more than a decade.   A new shiny app lets users explore effluent nutrient concentrations from an existing ...

Playing with GA data is much much easier now.Last week biggest news was definitely Google making a Demo Google Analytics Account available to everyone. As the word "demo" says, the main purpose is demonstrating all the features and reports GA offers, and become a learning platform for analysts. But ...

I have seen several time, that execute R code using procedure sp_execute_external_script was not valid due to missing library or library dependencies. Problem is – in general – not solved out of the box. But can be solved using and maintaining a list of installed libraries used by Microsoft ...

This tweet by mikefc alerted me to a mind-blowingly simple but amazing trick using the ggplot2 package: to visualise data for different groups in a facetted plot with all of the data plotted in the background. Here’s an example that we’ll learn to make in this post so ...

Have you ever tried to find a lightweight yet nice theme for the R Markdown documents, like this page? Themes for R Markdown With the powerful rmarkdown package, we could easily create nice HTML document by adding some meta information in the header, for example --- title: Nineteen Years Later ...

There are already some benchmarking studies about different classification algorithms out there. The probably most well known and most extensive one is the Do we Need Hundreds of Classifers to Solve Real World Classication Problems? paper. They use d...

Learners use features to make predictions but how those features are used is often not apparent. mlr can estimate the dependence of a learned function on a subset of the feature space using generatePartialDependenceData. Partial dependence plots reduce the potentially high dimensional function estimated by the learner, and display a ...

From HuffingtonPostThe New York Times made it look so easy. Take a few courses in data science and a web-based startup will readily pay top dollars for your newly acquired skills.Since the McKinsey Global Institute reported on the impending shortage of data crunchers, the wanna be data scientists are ...

R has been an indispensable tool since I started working with it about five years ago. Of course in my day job as a data scientist I couldn’t live without it, but it also proved to be a great aid in private life. Recently we bought our first house ...

Get the correlations of one or more variables with many others using focus() from the corrr package: library(corrr) mtcars %__% correlate() %__% focus(mpg) #__ # A tibble: 10 x 2 #__ rowname mpg #__ #__ 1 cyl -0.8521620 #__ 2 disp -0.8475514 #__ 3 hp -0.7761684 #__ 4 drat 0.6811719 #__ 5 wt -0.8676594 #__ 6 qsec 0.4186840 #__ 7 vs 0.6640389 #__ 8 am 0.5998324 #__ 9 gear 0.4802848 #__ 10 carb -0.5509251 Let’s break it down.  Motivation I’...