[fsiefken]

Nice, is there a maximum rowcount? What would be nice is a way to do a sum on a second or third column - or would you use awk to get those and pipe the result to st?

[nferraz]

There isn't a max rowcount for sum, mean, variance, etc, because it is not necessary to hold the data in memory.

The calculation of median and quartiles require that the whole set is stored and later sorted, so it is limited to the available memory.

Regarding your suggestion -- I'm considering the idea of dealing with multiple columns and even CSV and other types of tabulated data.

[nidoran]

cut is also a good option when dealing with column-based data. Just specify the delimiter and which column you want.