793 search results for "maps"

Drawing heatmaps in R

June 24, 2011
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Drawing heatmaps in R

A while back, while reading chapter 4 of Using R for Introductory Statistics, I fooled around with the mtcars dataset giving mechanical and performance properties of cars from the early 70's. Let's plot this data as a hierarchically clustered heatmap. # scale data to mean=0, sd=1 and convert to matrix mtscaled <- as.matrix(scale(mtcars)) # create...

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Plotting Maps with R

April 26, 2011
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Plotting Maps with R

I stumbled upon this tutorial while not studying and I thought it would be fun to try and plot maps of the San Francisco Bay Area household income, education, population density, poverty, etc...To do this I needed a Shapefile for the Bay Area zip codes similar to the London borough file used in...

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Visualizing iPhone location tracking with R and Google Maps

April 22, 2011
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Visualizing iPhone location tracking with R and Google Maps

Visualize location logs created by the iPhone using R and Google Maps.

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Good Looking Maps in R

April 21, 2011
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Good Looking Maps in R

I haven't yet tried this, but it looks like a nice package.In one recent project I needed to draw several maps and visualize different kinds of geographical data on it. I found the combination of R/ggplot/maps package extremely flexible and powerful,...

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Good Looking Maps in R

April 21, 2011
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Good Looking Maps in R

I haven't yet tried this, but it looks like a nice package.In one recent project I needed to draw several maps and visualize different kinds of geographical data on it. I found the combination of R/ggplot/maps package extremely flexible and powerful,...

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Maps of solar radiation

Maps of solar radiation

The Atmospheric Science Data Center (ASDC) at NASA Langley Research Center offers several data sources. For example, it is possible to download a text file with the 22-year (July 1983 – June 2005) monthly and annual average of global horizontal irradiation. nasafile <- 'http://eosweb.larc.nasa.gov/sse/global/text/global_radiation' nasa <- read.table(file=nasafile, skip=13, header=TRUE) With this data, R and the

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Google maps and travel times

April 1, 2011
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Google maps and travel times

Travel times and trip distances are at the core of urban economics. Many models of competition, housing markets, etc., rely on travel times or distances to explain the variance in economic outcomes. Determining travel times, especially non free-flow travel times (i.e., accounting for congestion) is however no trivial task. Google maps offer a...

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Google maps and travel times

April 1, 2011
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Google maps and travel times

Travel times and trip distances are at the core of urban economics. Many models of competition, housing markets, etc., rely on travel times or distances to explain the variance in economic outcomes. Determining travel times, especially non free-flow travel times (i.e., accounting for congestion) is however no trivial task. Google maps offer a...

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Example 8.31: Choropleth maps

March 22, 2011
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Example 8.31: Choropleth maps

In our book, we show a simple example of a map (section 6.4.2) where we read the boundary files as data sets and use SAS and R to plot them. But both SAS and R have complex functionality for using pre-compiled map data. To demonstrate them, we'll sho...

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Global Migration Maps

March 17, 2011
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Global Migration Maps

 Migrations of people have existed for millennia and oc

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