Error in the previous version of FA_residuals()
In the spirit of reproducible science, this is a post about an error I fixed in a function that affects all prior analyses with that. When factor analyzing data, the…
R functions for analyzing missing data
I'm reading Missing Data: A Gentle Introduction and it mentions various methods to understand how data are missing in a given dataset. The book, however, is light on actual tools.…
kirkegaard: Plot contingency table with ggplot2
This is a post in the on-going series about stuff in my package: kirkegaard [I'm not egocentric but since there is no central theme about the functions in the package…
Making use of list-arrays in R
Quick recap of the main object types in R from Advanced R: homogeneous heterogeneous 1-d atomic vector list 2-d matrix data.frame n-d array ??? So, objects can either store only…
Excluding missing or bad data in R: not as easy as it should be!
On-going series of posts about functions in my R package (https://github.com/Deleetdk/kirkegaard ). Suppose you have a list or a simple vector (lists are vectors) with some data. However, some of…
Causality, transitivity and correlation
Disclaimer: Some not too structured thoughts. It's commonly said that correlation does not imply causation. That is true (see Gwern's analysis), but does causation imply correlation? Specifically, if "→" means…
django, wsgi, apache: error 500
The problem Apache gives an error 500 (internal server error) when trying to access website running django 1.9 using wsgi based on the tutorial given at https://www.digitalocean.com/community/tutorials/how-to-serve-django-applications-with-apache-and-mod_wsgi-on-ubuntu-14-04. Running the server…
Numlock problems in Virtualbox linux Mint
My situation is this: I run linux Mint from Windows 8.1 using Virtualbox. I have disabled the numlock (and the other *lock keys) in Windows by rebinding my keyboard using…
R: fastest way of finding out of all elements of a vector are identical?
There is a question on SO about this: http://stackoverflow.com/questions/4752275/test-for-equality-among-all-elements-of-a-single-vector But I was a bit more curious, so! #test data, large vectors v1 = rep(1234, 1e6) v2 = runif(1e6) #functions to…
R: assign() inside nested functions
Recently, I wrote a function called copy_names(). It does what you think and a little more: it copies names from one object to another. But it can also attempt to…