New data-frame feature: missing values

[Steve Nunez]

Greetings all,

 

Just thought I’d mention that I recently added functionality for dealing with missing values to the data-frames library. It’s modelled mostly after R, so should be familiar. I like how the new data frame access methods are shaping up. Very lisp-like in the large. The docs are here:

 

https://lisp-stat.dev/docs/tasks/data-frame/#missing-values

 

in the end I went with a keyword sentinel value, :na, because using nil precluded having data-frames of Boolean values.

 

Comments and feedback always welcome.