435 search results for "boxplot"

Airline Performance Comparison with R/Shiny

August 2, 2015
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Airline Performance Comparison with R/Shiny

Open R shiny App from a new window here! Play with the App here: In this project I set out to build an interactive app to

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cricketr plays the ODIs!

August 2, 2015
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cricketr plays the ODIs!

Introduction In this post my package ‘cricketr’ takes a swing at One Day Internationals(ODIs). Like test batsman who adapt to ODIs with some innovative strokes, the cricketr package has some additional functions and some modified functions to handle the high strike and economy rates in ODIs. As before I have chosen my top 4 ODI

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cricketr plays the ODIs!

August 2, 2015
By
cricketr plays the ODIs!

Introduction In this post my package ‘cricketr’ takes a swing at One Day Internationals(ODIs). Like test batsman who adapt to ODIs with some innovative strokes, the cricketr package has some additional functions and some modified functions to handle the high strike and economy rates in ODIs. As before I have chosen my top 4 ODI

Read more »

15 Questions All R Users Have About Plots

July 30, 2015
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15 Questions All R Users Have About Plots

R allows you to create different plot types, ranging from the basic graph types like density plots, dot plots, bar charts, line charts, pie charts, boxplots and scatter plots, to the more statistically complex types of graphs such as probability plots, mosaic plots and correlograms. In addition, R is pretty known for its data visualization The post

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Computing AIC on a Validation Sample

July 29, 2015
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Computing AIC on a Validation Sample

This afternoon, we’ve seen in the training on data science that it was possible to use AIC criteria for model selection. > library(splines) > AIC(glm(dist ~ speed, data=train_cars, family=poisson(link="log"))) 438.6314 > AIC(glm(dist ~ speed, data=train_cars, family=poisson(link="identity"))) 436.3997 > AIC(glm(dist ~ bs(speed), data=train_cars, family=poisson(link="log"))) 425.6434 > AIC(glm(dist ~ bs(speed), data=train_cars, family=poisson(link="identity"))) 428.7195 And I’ve been asked...

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Why I use Panel/Multilevel Methods

July 24, 2015
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Why I use Panel/Multilevel Methods

I don’t understand why any researcher would choose not to use panel/multilevel methods on panel/hierarchical data. Let’s take the following linear regression as an example: , where is a random effect for the i-th group. A pooled OLS regression model for the above is unbiased and consistent. However, it will be inefficient, unless for all

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Why I use Panel/Multilevel Methods

July 24, 2015
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Why I use Panel/Multilevel Methods

I don’t understand why any researcher would choose not to use panel/multilevel methods on panel/hierarchical data. Let’s take the following linear regression as an example: , where is a random effect for the i-th group. A pooled OLS regression model for the above is unbiased and consistent. However, it will be inefficient, unless for all

Read more »

cricketr digs the Ashes!

July 20, 2015
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cricketr digs the Ashes!

Introduction In some circles the Ashes is considered the ‘mother of all cricketing battles’. But, being a staunch supporter of all things Indian, cricket or otherwise, I have to say that the Ashes pales in comparison against a India-Pakistan match. After all, what are a few frowns and raised eyebrows at the Ashes in comparison

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cricketr digs the Ashes!

July 20, 2015
By
cricketr digs the Ashes!

Introduction In some circles the Ashes is considered the ‘mother of all cricketing battles’. But, being a staunch supporter of all things Indian, cricket or otherwise, I have to say that the Ashes pales in comparison against a India-Pakistan match. After all, what are a few frowns and raised eyebrows at the Ashes in comparison

Read more »

R 101 – Aggregate By Quarter

July 14, 2015
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R 101 – Aggregate By Quarter

We were asked a question on how to (in R) aggregate quarterly data from what I believe was a daily time series. This is a pretty common task and there are many ways to do this in R, but we’ll focus on one method using the zoo and dplyr packages. Let’t get those imports out of the way: library(dplyr) library(zoo) library(ggplot2) Now, we need...

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