1223 search results for "Maps"

Moving The Earth (well, Alaska & Hawaii) With R

November 16, 2014
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Moving The Earth (well, Alaska & Hawaii) With R

In a previous post we looked at how to use D3 TopoJSON files with R and make some very D3-esque maps. I mentioned that one thing missing was moving Alaska & Hawaii a bit closer to the continental United States and this post shows you how to do that. The D3 folks have it easy.

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Applying A Divergent Color Scale to A Gene Expression Heat Map

November 14, 2014
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Applying A Divergent Color Scale to A Gene Expression Heat Map

Estimated Read Time: Under 5 minutes This is a quick post about a quick little experiment I tried lately. I saw a recent post about how red and blue color scales on political heat maps can be misleading--primarily because human perception is not very good at discriminating between shades of purple in the presented scenario. Since gene expression heat...

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Basic mapping and attribute joins in R

November 9, 2014
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Basic mapping and attribute joins in R

This post is based on the free and open source Creating-maps-in-R teaching resource for introducing R as a command-line GIS. R is well known as an language ideally suited for data processing, statistics and modelling. R has a number of spatial packages, allowing analyses that would require hundreds of lines of code in other languages to be implemented with...

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solar navigation

November 9, 2014
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solar navigation

Introduction Solar altitude is a function of time, longitude and latitude, and so it can be possible to infer location based on measuring altitude as a function of time. This form of solar navigation can be based on sunrise and sunset times, at least on non-equinox days. I have explored this for a school-based project I call “SkyView” involving light sensors and Arduino microcontrollers,...

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Improving R Data Visualisations Through Design

November 6, 2014
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Improving R Data Visualisations Through Design

When I start an R class, one of my opening lines is nea

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The reddit Front Page is Not a Meritocracy

November 6, 2014
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The reddit Front Page is Not a Meritocracy

I was pleasantly surprised when somebody shared my traveling salesman animation to reddit and the post made it all the way to reddit's default front page (i.e. the top 25). The gif racked up over 1.3 million pageviews on Imgur, a testament to reddit's traffic-generating prowess. Before the post made it to the front page, though, it was...

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How to extract Google Analytics data in R using RGoogleAnalytics

November 5, 2014
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How to extract Google Analytics data in R using RGoogleAnalytics

I am extremely thrilled to announce that RGoogleAnalytics was released recently by CRAN. R is already a swiss army knife for data analysis largely due its 6000 libraries. What this means is that digital analysts can now fully use the analytical capabilities of R to fully explore their Google Analytics Data. In this post, we will... Read More The post...

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A Look at the World Values Survey

November 4, 2014
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A Look at the World Values Survey

by Peggy Fan Ph.D. Candidate at Stanford's Graduate School of Education Part of my dissertation at Stanford Graduate School of Education, International Comparative Education program, is looking at the World Values Survey (WVS), a cross-national social survey that started in 1981. Since then there has been 6 waves, and the surveys include questions that capture the demographic, behaviors, personal...

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Shapefiles from Isodensity Curves

November 3, 2014
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Shapefiles from Isodensity Curves

Recently, with @3wen, we wanted to play with isodensity curves. The problem is that it is difficult to get – numerically – the equation of the contour (even if we can easily plot it). Consider the following surface (just for fun, in order to illustrate the idea) > f=function(x,y) x*y+(1-x)*(1-y) > u=v=seq(0,1,length=21) > v=seq(0,1,length=11) > f=outer(u,v,f) > persp(u,v,f,theta=angle,phi=10,box=TRUE, +...

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Leveraging R for Job Openings for Economists

November 1, 2014
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Leveraging R for Job Openings for Economists

Quite a few people emailed me regarding my post on Econ Job Market. This post is about how you can use very basic and simple R tools to help you in sorting through the Job Openings for Economists list from the American Economic Association.This definitely helped me in developing my spreadsheet of places to apply

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