2855 search results for "ggplot"

Shiny 0.10

June 20, 2014
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Shiny 0.10

Shiny 0.10 is now available on CRAN. Interactive documents In this release, the biggest changes were under the hood to support the creation of interactive documents. If you haven’t had a chance to check out interactive documents, we really encourage you to do so—it may be the easiest way to learn Shiny. New layout functions

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PITFALL: Did you really mean to use matrix(nrow, ncol)?

June 17, 2014
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PITFALL: Did you really mean to use matrix(nrow, ncol)?

Are you a good R citizen and preallocates your matrices? If you are allocating a numeric matrix in one of the following two ways, then you are doing it the wrong way!x <- matrix(nrow=500, ncol=100)orx <- matrix(NA, nrow=500, ncol=100)Why? Becau...

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Studying Ted Talks, Anscombe’s Quartet, and Modern Languages Enrollment

June 17, 2014
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While the feed from a newer github/jekyll blogging platform (patilv.github.io) is registered with blog aggregators, here are snippets of three posts that were recently published at the new site. Please click on the titles to visit the corresponding page. 1. Frequent Speakers at Ted and Word Cloud of Talk Titles A recent article in openculture.com by Dan Colman mentioned...

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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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The Gilbreath’s Conjecture

June 12, 2014
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The Gilbreath’s Conjecture

317 is a prime, not because we think so, or because our minds are shaped in one way rather than another, but because it is so, because mathematical reality is built that way (G.H. Hardy) In 1958, the mathematician and magician Norman L. Gilbreath presented a disconcerting hypothesis conceived in the back of a napkin. Gilbreath

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Bar charts with percentage labels but counts on the y axis

June 11, 2014
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Bar charts with percentage labels but counts on the y axis

Bar charts and histograms are easily to understand. I often write for non-specialist audiences so I tend to use them a lot. People like percentages too, so a bar chart with counts on the y axis but percentage labels is a useful thing to be able to produce. But how to do them in our

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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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In case you missed it: May 2014 Roundup

June 9, 2014
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In case you missed them, here are some articles from May of particular interest to R users: Karl Broman's hipsteR guide lists some new(ish) features of R that early adopters may have missed. Joseph Rickert reviews the R/Finance 2014 conference and summarizes the R packages presented there. Plus, a review of R's impact on computational finance, with links to...

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AlienVault Longitudinal Study Part 4

AlienVault Longitudinal Study Part 4

In Part 1 we looked at acquiring raw data, and wrangling it into a time series dataset. In Part 2 we looked at types of threats in the time series. In Part 3 we looked at countries. Now we will examine countries and types in combination in the AlienVault reputation database. Just as we shaped our dataset for better understanding in previous...

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