I think 2 is fulfilled with xsv with the frequency command and the select command. It's 2 commands, but it's not excel and it's reproducible. I find the source

I think 2 is fulfilled with xsv with the frequency command and the select command. It's 2 commands, but it's not excel and it's reproducible. I find the source code is kinda helpful to see what arguments I should set or how it works.