479 search results for "boxplot"

An Analysis of the Flint Michigan Water Crisis: Part 1 Initial Corrosivity

March 3, 2016
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The Flint River in Flint, Michigan, USA, in the late 1970s. By U.S. Army Corps of Engineers, photographer unknown via Wikimedia Commons Introduction As many have heard recently residents of Flint Michigan have been rightly outraged due to the high presence of toxic chemicals including lead in their drinking water. The question arises how did

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From spss to R, part 3

March 1, 2016
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From spss to R, part 3

In this post we will start with a build-in dataset and some basic ggplot graphics. In the next post we will combine dplyr and ggplot to do awesome stuff with the Dutch University student counts from the previous lessons. We will work with the build-in dataset mtcars. There are many datasets in r library(help = "datasets") but in many examples online...

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more e’s [and R’s]

February 21, 2016
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more e’s [and R’s]

Alex Thiéry suggested debiasing the biased estimate of e by Rhee and Glynn truncated series method, so I tried the method to see how much of an improvement (if any!) this would bring. I first attempted to naïvely implement the raw formula of Rhee and Glynn with a (large) Poisson distribution on the stopping rule

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Interactive plotting with rbokeh

February 17, 2016
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Hello everyone! In this post, I will show you how you can use rbokeh to build interactive graphs and maps in R. What is bokeh? Bokeh is a popular python library used for building interactive plots and maps, and now it is also available in R, thanks to Ryan Hafen. It is a very powerful

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Why I use ggplot2

February 12, 2016
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Why I use ggplot2

If you’ve read my blog, taken one of my classes, or sat next to me on an airplane, you probably know I’m a big fan of Hadley Wickham’s ggplot2 package, especially compared to base R plotting. Not everyone agrees. Among the anti-ggplot2 crowd is JHU Professor Jeff Leek, who yesterday wrote up his thoughts on the Simply Statistics...

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Clustering French Cities (based on Temperatures)

February 11, 2016
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Clustering French Cities (based on Temperatures)

In order to illustrate hierarchical clustering techniques and k-means, I did borrow François Husson‘s dataset, with monthly average temperature in several French cities. > temp=read.table( + "http://freakonometrics.free.fr/FR_temp.txt", + header=TRUE,dec=",") We have 15 cities, with monthly observations > X=temp > boxplot(X) Since the variance seems to be rather stable, we will not ‘normalize’ the variables here, > apply(X,2,sd) Janv Fevr Mars...

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South Carolina Republican Debate with R

January 19, 2016
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South Carolina Republican Debate with R

Continuing with the series analyzing republican debates, the latest in South Carolina confirms a few of the trends i’ve been observing, mainly that: Trump likes to repeat himself (maybe he likes to stick with what has worked so far?). Trump also likes to keep it short: everyone else says more things for longer at a time. The most...

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Water World

January 18, 2016
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Water World

I live in Utah, an extremely dry state. Like much of the western United States, Utah is experiencing water stress from increasing demand, episodes of drought, and conflict over water rights. At the same time, Utahns use a lot of water per capita compared to residents of other states. According to the United States Geological Survey, in...

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Annotate a phylogenetic tree with insets

January 11, 2016
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Annotate a phylogenetic tree with insets

ggtree implemented a function, subview, that can add subplots on a ggplot2 object. It had successful applied to plot pie graphs on map. set.seed(2016-01-04) tr <- rtree(30) tr <- groupClade(tr, node=45) p <- ggtree(tr, aes(color=group)) + g...

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Annotate a phylogenetic tree with insets

January 11, 2016
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Annotate a phylogenetic tree with insets

Ggtree implemented a function, subview, that can add subplots on a ggplot2 object. It had successful applied to plot pie graphs on map. set.seed(2016-01-04) tr <- rtree(30) tr <- groupClade(tr, node=45) p <- ggtree(tr, aes(color=group)) + g...

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