5038 search results for "git"

Rewriting plot.qcc using ggplot2 and grid

March 3, 2014
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Rewriting plot.qcc using ggplot2 and grid

A new ggplot2-based implementation of control charts for the #RStats package qcc, and some lessons learned along the way.

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Consecutive Numbers in Lottery Draws

March 2, 2014
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A historian, a data scientist, a programmer, a mathematician, and a philosopher discuss the question, how likely it is that a lottery draw (6 out of 49) contains two consecutive numbers. The historian The historian argues that from 1955 up to 2011, there were 5026 lottery draws in Germany, every Saturday, and from 2000 on, two draws every...

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Computing R square for Generalized Linear Mixed Models in R

March 2, 2014
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Computing R square for Generalized Linear Mixed Models in R

R square is a widely used measure of model fitness, in General Linear Models (GLM) it can be interpreted as the percent of variance in the response variable explained by the model. This measure is unitless which makes it useful to compare model between studies in meta-analysis analysis. Generalized Linear Mixed models (GLMM) are extending

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Release of jsonlite 0.9.4

March 2, 2014
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Release of jsonlite 0.9.4

A new version of the jsonlite package was released to CRAN. In addition to adding small new features, this release cleans up code and documentation. Some annoying compiler warnings inherited from RJSONIO are fixed and the reference manual is a bit more concise. Also some new examples of public JSON...

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Reading OECD.Stat into R

March 1, 2014
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Reading OECD.Stat into R

OECD.Stat is a commonly used statistics portal in the research world but there are no easy ways (that I know of) to query it straight from R. There are two main benefits of querying OECD.Stat straight from R: 1. Create reproducible analysis (something that is easily lost if you have to download excel files) 2.

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Use GDAL from R Console to Split Raster into Tiles

March 1, 2014
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Use GDAL from R Console to Split Raster into Tiles

When working with raster datasets I often encounter limitations caused by the large size of the files. I thus wrote up a little R function that invokes gdal_translate which would split the raster into parts.The screenshot to the left shows a raster in QGIS that was split into four parts with the below script.## get filesnames...

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A great idea: R Markdown for Undergrads

March 1, 2014
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A great idea: R Markdown for Undergrads

A recently published paper by Baumer et al (2014) caught my eye today (HT to Bruce Caron).  I wanted to share it here because I thought it was cool and also had a few comments to make about some of the issues the authors raised. First, a bit about the paper.  Partly in response to all the

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A great idea: R Markdown for Undergrads

March 1, 2014
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A great idea: R Markdown for Undergrads

A recently published paper by Baumer et al (2014) caught my eye today (HT to Bruce Caron).  I wanted to share it here because I thought it was cool and also had a few comments to make about some of the issues the authors raised. First, a bit about the paper.  Partly in response to all the

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Individuals and Moving Range Charts in R

March 1, 2014
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Individuals and Moving Range Charts in R

Individuals and moving range charts, abbreviated as ImR or XmR charts, are an important tool for keeping a wide range of business and industrial processes in the zone of economic production, where a process produces the maximum value at the minimum costs. While there are many commercial applications that will produce such charts, one of

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The tf-idf-Statistic For Keyword Extraction

February 27, 2014
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The tf-idf-Statistic For Keyword Extraction

The tf-idf-statistic (“term frequency – inverse document frequency”) is a common tool for the purpose of extracting keywords from a document by not just considering a single document but all documents from the corpus. In terms of tf-idf a word … Continue reading → The post The tf-idf-Statistic For Keyword Extraction appeared first on joy...

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