search for: 365636

Displaying 1 result from an estimated 1 matches for "365636".

Did you mean: 65636
2011 Aug 30
3
Descriptive Stats from Data Frame
I don't find how to do what I need to do in Dalgaard or 'R Cookbook', so I'm asking here. I have a data frame with water chemistry data and I want to start exploring these data. There are three factors (site, date, chemical) associated with each measurement. The data frame looks like this: > summary(chemdata) site_id.sample_date.param.quant