# Blog Archives

## Fifty Shades of Grey in R

November 27, 2012
By

My wife went out to her book group tonight and their book of the month was 50 Shades of Grey. Sadly, I could think of is that plotting 50 shades in R would be a neat exercise. require(ggplot2) grey50 <- data.frame( x = rep(1:10, 5), y = rep(1:5, ...

## Fun with coin flips

November 21, 2012
By

We all know that the odds of flipping an unbiased coin is 50% heads, 50% tails. But what happens if you do this a lot of times. Do you expect the same number of heads and tails? What if we took a cumulative sum where heads = +1 and tails = -1. What wou...

## Fun with coin flips

November 21, 2012
By

We all know that the odds of flipping an unbiased coin is 50% heads, 50% tails. But what happens if you do this a lot of times. Do you expect the same number of heads and tails? What if we took a cumulative sum where heads = +1 and tails = -1. What wou...

## Visualizing Missing Data

November 17, 2012
By

There are several graphics available for visualizing missing data including the VIM package. However, I wanted a plot specifically for looking at the nature of missingness across variables and a clustering variable of interest to support data preparati...

## Visualizing Missing Data

November 17, 2012
By

There are several graphics available for visualizing missing data including the VIM package. However, I wanted a plot specifically for looking at the nature of missingness across variables and a clustering variable of interest to support data preparati...

## User Input using tcl/tk

August 13, 2012
By

I was inspired by Kay Cichini  recent post on creating a a tcl/tk dialog box for users to enter variable values. I am going to have a use for this very soon so took some time to make it a bit more generic. What I wanted is a function that takes a vector (of variable names)

## User Input using tcl/tk

August 13, 2012
By

I was inspired by Kay Cichini recent post on creating a a tcl/tk dialog box for users to enter variable values. I am going to have a use for this very soon so took some time to make it a bit more generic. What I wanted is a function that takes a vector...

## User Input using tcl/tk

August 13, 2012
By

I was inspired by Kay Cichini recent post on creating a a tcl/tk dialog box for users to enter variable values. I am going to have a use for this very soon so took some time to make it a bit more generic. What I wanted is a function that takes a vector...

## Graphic Parameters (symbols, line types, and colors) for ggplot2

April 27, 2012
By

Following up on John Mount’s post on remembering symbol parameters in ggplot2, I decided to give it a try and included symbols, line types, and colors (based upon Earl Glynn’s wonderful color chart).  Code follows below. require(ggplot2) ...

## Graphic Parameters (symbols, line types, and colors) for ggplot2

April 27, 2012
By

Following up on John Mount’s post on remembering symbol parameters in ggplot2, I decided to give it a try and included symbols, line types, and colors (based upon Earl Glynn’s wonderful color chart).  Code follows below. require(ggplot2) ...