3064 search results for "map"

Specifying complicated groups of time series in hts

June 14, 2014
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With the latest version of the hts package for R, it is now possible to specify rather complicated grouping structures relatively easily. All aggregation structures can be represented as hierarchies or as cross-products of hierarchies. For example, a hierarchical time series may be based on geography: country, state, region, store. Often there is also a separate product hierarchy: product...

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Identifying Pathways in the Consumer Decision Journey: Nonnegative Matrix Factorization

June 13, 2014
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Identifying Pathways in the Consumer Decision Journey: Nonnegative Matrix Factorization

The Internet has freed us from the shackles of the yellow page directory, the trip to the nearby store to learn what is available, and the forced choice among a limited set of alternatives. The consumer is in control of their purchase journey and can t...

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Can You Track Me Now? (Visualizing Xfinity Wi-Fi Hotspot Coverage) [Part 2]

June 13, 2014
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Can You Track Me Now? (Visualizing Xfinity Wi-Fi Hotspot Coverage) [Part 2]

This is the second of a two-part series. Part 1 set up the story and goes into how to discover, digest & reformat the necessary data. This concluding segment will show how to perform some basic visualizations and then how to build beautiful & informative density maps from the data and offer some suggestions as to how to...

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Proficiency levels @ PISA and visualisation challenge @ useR!2014

June 13, 2014
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Proficiency levels @ PISA  and visualisation challenge @ useR!2014

16 days to go for submissions in the DataVis contest at useR!2014 (see contest webpage). The contest is focused on PISA data and students’ skills. The main variables that reflect pupil skills in math / reading / science are plausible values e.g. columns PV1MATH, PV1READ, PV1SCIE in the dataset. But, these values are normalized to

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Five Hard-Won Lessons Using Hive

June 12, 2014
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I’ve been spending a ton of time lately on the data engineering side of ‘data science’, so I’ve been writing a lot of Hive queries. Hive is a great tool for querying large amounts of data, without having to know very much about the underpinnings of Hadoop. Unfortunately, there are a lot of things about Five Hard-Won...

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Visualizing Bus Stops with rCharts

June 11, 2014
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I wanted to create a quick visualization of Bloomington IL bus stops. This data is in pdf file format spread across multiple files. The first step, before any mapping can occur, is downloading those files, parsing them to get the bus stop locations and...

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Extract Coordinates and Other Data from KML in R

June 11, 2014
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KML files are used to visualize geographical data in Google Earth. These files are written in XML and allow to visualize places and to attach additional data in HTML format.In these days I am working with the MIDAS database of wind measuring stations a...

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Making Back-to-Back Histograms

June 10, 2014
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Making Back-to-Back Histograms

A colleage of mine asked me how to do back to back histograms (instead of on top of each other). I feel as though there should be a function like voilin plot from the vioplot package. Voilin plots are good for displaying data, but the violin must have the left and right (or top and

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rOpenSci awarded $300k from the Sloan Foundation

June 10, 2014
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We're delighted to announce that we have received additional funding from the Sloan Foundation to continue and expand our efforts from the past year. We're grateful for the overwhelming support from the community, especially through engagement at various events we organized and attended this past year. Over the next year we plan to: advance not only the...

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The joy of joining data.tables

June 9, 2014
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The joy of joining data.tables

The example I present here is a little silly, yet it illustrates how to join tables with data.table in R. Mapping old data to new dataCategories in general are never fixed, they always change at some point. And then the trouble starts with the data. For example not that long ago we didn't distinguish between smartphones and dumbphones,...

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