3275 search results for "MAP"

DescTools: a new R "misc package"

September 25, 2014
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DescTools: a new R "misc package"

by Joseph Rickert One of the most difficult things about R, a problem that is particularly vexing to beginners, is finding things. This is an unintended consequence of R's spectacular, but mostly uncoordinated, organic growth. The R core team does a superb job of maintaining the stability and growth of the R language itself, but the innovation engine for...

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How Many Paths are Possible in an 18 Hole Round of Match Play Golf?

September 25, 2014
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How Many Paths are Possible in an 18 Hole Round of Match Play Golf?

In honor of the Ryder Cup, here's a fun puzzle for the mathematically inclined golfer to consider: how many different paths are possible in an 18 hole round of match play golf? If you'd rather not wade through the math then you can skip ahead to the "practical exploration" section of this post to see some actual match play...

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Changing the Light Azimuth in Shaded Relief Representation by Clustering Aspect

September 24, 2014
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Some time ago I published an article on "The Cartographic Journal" regarding a method to automatically change the light azimuth in shaded relief representations.This method was based on clustering the aspect derivative of the DTM. The method was develo...

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PubMed Publication Date: what is it, exactly?

September 23, 2014
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PubMed Publication Date: what is it, exactly?

File this one under “has troubled me (and others) for some years now, let’s try to resolve it.” Let’s use the excellent R/rentrez package to search PubMed for articles that were retracted in 2013. 117 articles. Now let’s fetch the records in XML format. Next question: which XML element specifies the “Date of publication” (PDAT)?

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Seeing the (day)light with R

September 23, 2014
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Seeing the (day)light with R

The arrival of the autumnal equinox foreshadows the reality of longer nights and shorter days here in the northeast US. We can both see that reality and distract ourselves from it at the same time by firing up RStudio (or your favorite editor) and taking a look at the sunrise & sunset times based on

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How to publish R and ggplot2 to the web

September 23, 2014
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How to publish R and ggplot2 to the web

by Matt Sundquist, Plotly Co-founder It's delightfully smooth to publish R code, plots, and presentations to the web. For example: Shiny makes interactive apps from R. Pretty R highlights R code for HTML. Slidify makes slides from R Markdown. Knitr and RPubs let you publish R Markdown docs. GitHub and devtools let you quickly release packages and collaborate. Now,...

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What is Cluster Analysis? A Projective Test

September 22, 2014
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What is Cluster Analysis? A Projective Test

Supposedly, projective tests (e.g., the inkblots of psychoanalysis) contain sufficient ambiguity that "what you see" reveals some aspect of your thinking that has escaped your awareness. Although the following will provide no insight into your neurotic...

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Build Predictive Model on Big data: Using R and MySQL Part-1

September 21, 2014
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Build Predictive Model on Big data: Using R and MySQL Part-1

Wellcome to the series blog posts. Since long time, I am writing post on Machine learning with R. Today I am gonna discuss on big data problem while fitting machine learning on it and its solution using MySQL and R. Before we jump directly to solution, let us discuss about big data little bit. (You The post Build...

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The New Consumer Requires an Updated Market Segmentation

September 18, 2014
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The New Consumer Requires an Updated Market Segmentation

The new consumer is the old consumer with more options and fewer prohibitions. Douglas Holt calls it the postmodern market defined by differentiation: "consumer identities are being fragmented, proliferated, recombined, and turned into salabl...

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“Do You Want to Steal a Snowman?” – A Look (with R) At TorrentFreak’s Top 10 PiRated Movies List #TLAPD

September 18, 2014
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“Do You Want to Steal a Snowman?” – A Look (with R) At TorrentFreak’s Top 10 PiRated Movies List #TLAPD

We leave the Jolly Roger behind this year and turn our piRate spyglass towards the digital seas and take a look at piRated movies as seen through the lens of TorrentFreak. The seasoned seadogs who pilot that ship have been doing a weekly “Top 10 Pirated Movies of the Week” post since early 2013, and...

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