April 2010

Estimating Missing Data with aregImpute() {R}

April 19, 2010 | dylan

  Missing Data Soil scientists routinely sample, characterize, and summarize patterns in soil properties in space, with depth, and through time. Invariably, some samples will be lost or sufficient funds required for complete characterization can run out. In these cases the scientist is left with a data table that contains holes (... [Read more...]

R tip: Maximum screen width

April 19, 2010 | Stewart MacArthur

R can be annoying in that even if you stretch your terminal or R GUI session to a whole screen width it will still only show 80 characters width. This can make wide tables really hard to read. options(width=150)Use the options command width to set... [Read more...]

Example 7.33: Specifying fonts in graphics

April 19, 2010 | Ken Kleinman

For interactive data analysis, the default fonts used by SAS and R are acceptable, if not beautiful. However, for publication, it may be important to manipulate the fonts. For example, it would be desirable for the fonts in legends, axis labels, or o...
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Thoughts on LSPM from R/Finance 2010

April 18, 2010 | Joshua Ulrich

I just got back from R/Finance 2010 in Chicago. If you couldn't make it this year, I strongly encourage you to attend next year. I will post a more comprehensive review of the event in the next couple days, but I wanted to share some of my notes spec...
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Sudokus more random than random!

April 18, 2010 | xi'an

Darren Wraith pointed out this column about sudokus to me. It analyses the paper by Newton and De Salvo published in the Proceedings of the Royal Academy of Sciences A that I cannot access from home. The discussion contains this absurd sentence “Sudoku matrices are actually more random than randomly-generated ... [Read more...]

Summarising data using scatter plots

April 18, 2010 | Ralph

A scatter plot is a graph used to investigate the relationship between two variables in a data set. The x and y axes are used for the values of the two variables and a symbol on the graph represents the combination for each pair of values in the data set. ...
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alphahull: an R Package for Alpha-Convex Hull

April 16, 2010 | Yihui Xie

new paper on the α-convex hull appeared in the Journal of Statistical Software today (http://www.jstatsoft.org/v34/i05/paper). The α-convex hull is an interesting problem which caught my attention long time ago but I didn’t know a solution then. R has a function chull() which can ... [Read more...]

Significant Figures in R and Rounding

April 16, 2010 | Neil Gunther

This is a follow-on to my previous post about determining significant digits, or sigdigs, in performance and capacity planning calculations. Once we know how to do that, inevitably we will be faced with rounding the result of a calculation to the least...
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Simulating Dart Throws in R

April 16, 2010 | JD Long

Back in November 2009 Wired wrote an article about some grad students who decided to try to stochastically model throwing darts. Because I don’t actually read printed material I didn’t see the article until a couple of months ago. My immediate thought was, “hey, I drink beer. I throw ... [Read more...]

R Command Line

April 16, 2010 | Lee

I am an R user! And I see a whole army of R users, here in defiance of tyranny. You’ve come to use R as free men… and free men you are. What will you do with that freedom? Will you use R? Use R and you may use ...
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R – not the epic fail we thought

April 16, 2010 | John Johnson

I usually like AnnMaria's witty insight. I can relate to a lot of what she is saying. After all SAS and family life are large parts of my life, too. But you can imagine the reaction she provoked in saying the following:I know that R is free and I ... [Read more...]

Rcpp 0.7.12

April 16, 2010 | Thinking inside the box

A new bug fix versions 0.7.12 of Rcpp is awaiting inclusion into CRAN and Debian. It is also available from here. This is another bug-fix version related solely to a build failure on Windows. Trying to protect paths with spaces has the side-effect... [Read more...]

The Next Big Thing: SAS and SPSS!…wait, what?

April 15, 2010 | Drew Conway

Thanks to the R Bloggers aggregator I came across Yihui Xie’s post on a piece currently making the rounds about statistical analysis platforms. In The Next Big Thing, AnnMaria De Mars makes the argument that R—as a statistical computing platform—is not well suited for what she views ... [Read more...]

Saving the world with R

April 15, 2010 | David Smith

Tuesday's meeting of the Bay Area R UseR Group at the LinkedIn offices was a great event. The headline speaker was Joe Adler, author of the excellent R reference manual, R in a Nutshell. Joe's presentation was an in-depth look at the relative speed of various options in R for ... [Read more...]

R is an Epic Fail?

April 15, 2010 | Yihui Xie

I came across this blog post just now: The Next Big Thing, and of course these words caught my attention: [...] However, for me personally and for most users, both individual and organizational, the much greater cost of software is the time it takes to install it, maintain it, learn it ... [Read more...]
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