write-csv writes too many column rows

[atgreen]

My df has extensible array columns. When I save the df as a csv file, it's writing out (array-total-size column) rows, padded with 0s, instead of (length column) rows of actual data.

Specifically, I create my columns like so: (make-array 0 :adjustable t :fill-pointer t), and then add to them over time. The resulting csv file pads out the data to my implementation's allocated array memory instead of showing only the data in the array.

[Symbolics]

@atgreen, apologies for the long delay on this. This looks like an artefact of the requirement for all columns in a data-frame to be the same length. It might be that the data object is more suited to your use case? It allows unequal column lengths. This class was inherited, and I've never used it, but it seems like it might do the trick. I don't know how the remaining generic functions will deal with it, but it will be interesting to find out.

[snunez1]

@atgreen how did you go with your unequal length data columns?