I was re-reading Michael Murray’s explanation of cointegration:
and marvelling at the calculus.
Calculus blows my mind sometimes. Like, hey guess how much we can do with subtraction.
— protëa(@isomorphisms) March 28, 2013
Of course it’s not any subtraction. It’s subtracting a function from a shifted version of itself. Still doesn’t sound like a universal revolution.
(But of course the...
The Cauchy distribution (?dcauchy in R) nails a flashlight over the number line
and swings it at a constant speed from 9 o’clock down to 6 o’clock over to 3 o’clock. (Or the other direction, from 3→6→9.) Then counts Read more »
Tibshirani’s original paper on the lasso.
This is one of those papers that I’m so excited about, I feel like “You should just read the whole thing! It’s all good!” But I realise that’s less than reasonable.
Here is a bit of summary,...
nice ggplot intro tutorial. Just run the commands, about 6 pages = flexible 1-3 hours of learning, depending how much reading you want to pair it with by Ramon Saccilotto
POSIXct is the signed number of seconds since “the epoch”. For example it was
when I wrote this. (1351298112 UTC = Sat Oct 27, 2:35 am GMT = Fri Oct 26, 8:35 pm EST = Fri Oct 26, 5:35 pm PST = 2:35 pm HST)
POSIXlt is one of many text | character | string formats such as:
I’ve peeped a number of object-oriented R tutorials. This is the first one I could make it through. Easy and pleasant to read.
Economic geography of the eastern USA circa 1999, median incomes by zip code Code and data source to follow in a longer post.
Why trust some supposed laws of statistical sampling and convergence when you can just test them yourself? If you have a computer with R installed (also recommended: Rstudio) then you can stop dithering about whether these n=1000 studies cited in the n...
What follows is like a kata to strengthen your R fundamentals. The lovely stats in the wild recently posted some hott data analysis of Olympians’ ages and sexes. Because I’m annoyingly picky about graphics, I asked for his code so I could ...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
