2174 search results for "map"

Creating a zoomable map of tweets with R

June 3, 2013
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Creating a zoomable map of tweets with R

Languages tweeted around Germany: red, blue, green, yellow, grey are for German, French, English, Dutch and other  respectively. See here for a zoomable version.Motivated by the project twitter languages of New York I wanted to...

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Mapping a Revolution

June 1, 2013
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Mapping a Revolution

Twitter has become an important communications tool for political protests. While mass media are often censored during large-scale political protests, Social Media channels remain relatively open and can be used to tell the world what is happening and to mobilize support all over the world. From an analytic perspective tweets with geo information are

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A map of the world by tweets

June 1, 2013
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A map of the world by tweets

With geo-tagging enabled, tweets include information on the location of the user when the tweet was sent. Miguel Rios (@miguelrios) has plotted locations of billions of tweets to create maps of the world. This is pretty amazing stuff – a world map rendered just from twitter posts! Maps are created using every tweet from 2009

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Look Familiar? Mapping in R

May 29, 2013
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Look Familiar? Mapping in R

For those who have been following the R-Bloggers this picture should be yesterdays news, but there was an article on the BBC on it, full story HERE. I find it interesting how it was on Drudge Report (www.drudgereport.com) which gets over 1 million hits...

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Stepping up to Big Data with R and Python: A Mind Map of All the Packages You Will Ever Need

May 29, 2013
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Stepping up to Big Data with R and Python: A Mind Map of All the Packages You Will Ever Need

On May 8, we kicked off the transformation of R Users DC to Statistical Programming DC   (SPDC) with a meetup at iStrategyLabs in Dupont Circle. The meetup, titled “Stepping up to big data with R and Python,” was an … Continue reading →The post Stepping up to Big Data with R and Python: A Mind Map...

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Working with shapefiles, projections and world maps in ggplot

May 23, 2013
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Working with shapefiles, projections and world maps in ggplot

In this post I show some different examples of how to work with map projections and how to plot the maps using ggplot. Many maps that are using the default projection are shown in the longlat-format, which is far from optimal. Here I show how to use either the Robinson or Winkel Tripel projection. Read more

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3D Mapping in R

May 8, 2013
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3D Mapping in R

This tutorial has been kindly contributed by Robin Edwa

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heatmaps with p-values (2)… coloured according to odds ratio

May 7, 2013
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heatmaps with p-values (2)… coloured according to odds ratio

I like heatplots with p-values -or frequencies, or whatever-. Not very conclusive, but pretty anyway. And when talking about graphs, pretty will make our neurons to fire in more interesting ways: neurons like “pretty” graphs. Moreover, observing your data can … Sigue leyendo →

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… ridiculously photogenic factors (heatmap with p-values)

May 5, 2013
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… ridiculously photogenic factors (heatmap with p-values)

Some months ago, I had to explore a vast amount of categorical variables before making some multivariate analyses. One good way to know your raw data, to make new hypotheses…etc, is to calculate some pairwise “crude” chi-square tests of independence … Sigue leyendo →

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Stamen maps with spplot

Stamen maps with spplot

Several R packages provide an interface to query map services (Google Maps, Stamen Maps or OpenStreetMap) to obtain raster images …Continuar leyendo »

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