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 →
Before choosing to support the purchase of Statistica at my workplace, I came across the ff package as an option for working with really big datasets (with special attention paid to ff dataframes, or ffdf). It looked like a good … Continue reading →
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 →
Context: I work with data from non-profit organizations, and so a big concern in many of my analyses is if and how much people are donating from one year to the next. One of the things I normally like to do … Continue reading →
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 →
This past week for work I had to create some plots to show the max, min, and median of a measure across the levels of a qualitative variable, and show the max and min of the same variable within a … Continue reading →
I recently finished a long stretch of work on a particular project that required me to draw upon four R packages. Each time I got back to my work on the project, I’d have to load the packages manually, as … Continue reading →
Usually, I like to write about the solutions to problems I’ve had, but today I only have a problem to write about. This is the second research job I’ve had outside of academia, and in both cases I’ve met with … Continue reading →
Ever since I started using ggplot2 more often at work in order to do graphs, I’ve realized something about the use of colour in bar graphs vs. dot plots: When I’m looking at a graph displayed on the brilliant Viewsonic … Continue reading →
The main reason why I have usually chosen to use excel to make my plots at work is because I had difficulty feeding the summary stats in R into a plotting function. One thing I learned this week is how … Continue reading →
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
