columnar delta tool

[Notgnoshi]

$ cat region.log | grep FF50..#01 | sed -E 's/.*\((.*)\).*$/\1 \1/' | awk 'p{print $1, $0-p}{p=$0}' | grep -vE '(0\.0|0\.1|0\.2)'
1.986412 0.357311
2.088956 0.58994
3.301731 0.302626
4.934772 0.301161
5.839620 0.344611
6.000021 0.300723
7.778109 0.334025
8.769092 0.307078
9.812035 0.331315

• [ ] Use a cut like syntax/behavior to pick a field to calculate inter-row deltas.
• [ ] Optionally preserve the other fields
• [ ] Add a new tool to zero-center a row (related: https://github.com/Notgnoshi/dotfiles/issues/59 )