[datatable-help] Have monthly data, need log of the difference. How?

[ellie]

Thank you for replying! I'll try to attach an image of some of my data, so
you will see the structure. I want to run some regressions with the natural
log of the difference, so I guess the first step would be to extract the
change between each date? I'm almost completely new to R, and would
appreciate any tips on how to proceed.
<http://r.789695.n4.nabble.com/file/t386157/data-img.png> 



--
Sent from: http://r.789695.n4.nabble.com/datatable-help-f2315188.html