Articles by inkhorn82

Estimate Age from First Name

July 29, 2013 | inkhorn82

Today I read a cute post from Flowing Data on the most trendy names in US history. What caught my attention was a link posted in the article to the source data, which happens to be yearly lists of baby … Continue reading → [Read more...]

When the “reorder” function just isn’t good enough…

May 6, 2013 | inkhorn82

The reorder function, in R 3.0.0, is behaving strangely (or I’m really not understanding something).  Take the following simple data frame: df = data.frame(a1 = c(4,1,1,3,2,4,2), a2 = c(“h”,”j”,”j”,”e”,”c”,”h”,”c”)) I expect that if I call the reorder function on the … Continue reading → [Read more...]

Split, Apply, and Combine for ffdf

March 22, 2013 | inkhorn82

Call me incompetent, but I just can’t get ffdfdply to work with my ffdf dataframes.  I’ve tried repeatedly and it just doesn’t seem to work!  I’ve seen numerous examples on stackoverflow, but maybe I’m applying them incorrectly.  Wanting to do some … Continue reading → [Read more...]

My Goodness. What a Fat Dataset!

October 25, 2012 | inkhorn82

Recently at work we got sent a data file containing information on donations to a specific charitable organization, ranging all the way back to the 80′s.  Usually, when we receive a dataset with a donation history in it, each row … Continue reading → [Read more...]

A function to find the “Penultimax”

September 13, 2012 | inkhorn82

Penulti-what?  Let me explain: Today I had to iteratively go through each row of a donor history dataset and compare a donor’s maximum yearly donation total to the second highest yearly donation total.  In even more concrete terms, for each … Continue reading → [Read more...]

A Return to Reliable R

September 5, 2012 | inkhorn82

The saga with Statistica continues: Statistica kept crashing on me while doing my data processing.  One of the big problems was a wonderful bug that occurred when some of my text data variables were coded (unsurprisingly) as text!  Under this … Continue reading → [Read more...]

Using R from Inside Statistica

August 17, 2012 | inkhorn82

I’ve been spending a lot of time in the last month or so doing projects at work not statistics related, hence the lack of posts!  In the interim, I had to do some serious research on handling datasets bigger than … Continue reading → [Read more...]
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