Recently, I was talking about vectors. At that time, I had to stop and recall how I had been representing vectors. Ideally, I should stick with the same notation I used in Basics: Vectors and Vector ...

What’s the state abbreviation for Arkansas? Is it AR? AK? AS? Maybe you’ve got a data frame with the information. Or any info where there’s one column with categories, and another column with values.

I’ve chatted with enough bots to know when something feels a little off. Sometimes, they’re overly flattering. Other times, weirdly evasive. And occasionally, they take a hard left into completely ...