Data frame columns as arguments to dplyr functions
Suppose that you would like to create a function which does a series of computations on a data frame. You would like to pass a column as this function’s argument....continue reading.
Category: R News
The cdlTools R package
This is a brief tutorial on the cdlTools package developed by Lu Chen and I to download and perform some simple analysis on USDA’s cropland data layer (CDL). This tutorial...continue reading.
Time Series Analysis in ArcGIS
In this post I will introduce another toolbox I created to show the functions that can be added to ArcGIS by using R and the R-Bridge technology.In this toolbox I...continue reading.
MICAD: A new algorithm/R package for anomaly detection
Overview Anomaly detection algorithms are core to many fraud and security applications/business solutions. Identifying cases where specific values are outside norms can be useful in outlier detection (as a predicate...continue reading.
Accurate Part-of-Speech tagging of German texts with NLTK
Part-of-speech tagging or POS tagging of texts is a technique that is often performed in Natural Language Processing. It allows … Read More →continue reading.
Autocorrecting misspelled Words in Python using HunSpell
When you’re dealing with natural language data, especially survey data, misspelled words occur quite often in free-text answers and might … Read More →continue reading.
EGRET plotFlowConc using ggplot2
Marcus Beck (USEPA) Laura DeCicco (USGS-OWI) Introduction EGRET is an R-package for the analysis of long-term changes in water quality and streamflow, and includes the water-quality method Weighted Regressions on...continue reading.
#rstudio #github missing command lines for mac setup @rstudio @github @swcarpentry
Preamble Every few months, I try to do a clean install on my machine. I know that OS X Sierra is due out in September, but I elected to do...continue reading.
The Power of ggplot2 in ArcGIS – The Plotting Toolbox
In this post I present my third experiment with R-Bridge. The plotting toolbox is a plug-in for ArcGIS 10.3.x that allows the creation of beautiful and informative plot, with ggplot2,...continue reading.
Kernel k nearest neighbors
This blog post is about my recently released package on CRAN, KernelKnn. The package consists of three functions KernelKnn, KernelKnnCV and knn.index.dist. It also includes two data sets (housing data,...continue reading.
Submitting your first package to CRAN, my experience
I recently published my first R package to The Comprehensive R Archive Network (CRAN). It was very exciting and also quite easy. Let me walk you through my process. First...continue reading.
Best way to draw heatmap for publication
Here are two tips I can share if you were also working on a big dataset towards a high quality heatmap:1. Don’t generate PDF using pheatmap() or heatmap.2() as (i)...continue reading.
Data Mining OCR PDFs – Getting Things Straight
The first article of my series about extracting tabular data from PDFs focused on rather simple cases; cases that allowed … Read More →continue reading.
Time Averages of NetCDF files from ECMWF in ArcGIS with R-Bridge
With this post I would like to talk again about R-Bridge, which allows a direct communication between ArcGIS and R.In the previous post, I presented a very simple application of...continue reading.
OpenImageR, an image processing toolkit
This blog post is about my recently released package on CRAN , OpenImageR. The package supports functions for image pre-processing, filtering and image recognition and it uses RccpArmadillo extensively to...continue reading.
Introducing Badgecreatr, a package that places badges in your readme
Introducing Badgecreatr, a package to create and place badges in your readme.Rmd file on Github. Badgecreatr will create the following badges (aka shields): Installation Install the package with install.packages("badgecreatr") …continue reading.
Best practices for logging computational systems in R and Python
As is the case with most quant software, it’s a bit different from run-of-the-mill software. The somewhat prosaic world of …Continue reading →continue reading.
Fatal Police Shootings Across the U.S.
I have been full of grief and sadness and some anger in the wake of yet more videos going viral in the past couple days showing black men being killed...continue reading.
Creating inset maps using spatial objects
This post explains how to create an inset map with spatial objects using the sp- and raster-package.continue reading.
xml2 1.0.0
We are pleased to announced that xml2 1.0.0 is now available on CRAN. Xml2 is a wrapper around the comprehensive libxml2 C library, and makes it easy to work with...continue reading.
