[R] Descriptive Stats from Data Frame

[Rich Shepard]

On Tue, 30 Aug 2011, David Winsemius wrote:

> I think you need to go back and do your input operations again with
> sep="|"

David,

   Yes, that's better. I did not know of the sep option. The new results:

> str(chemdata)
'data.frame':   14886 obs. of  4 variables:
  $ site_id    : Factor w/ 148 levels "BC-0.5","BC-1",..: 104 145 126 115 114
128 124 2 3 3 ...
  $ sample_date: Factor w/ 1012 levels "1980-03-01","1980-05-01",..: 432 410
423 405 398 408 401 360 366 407 ...
  $ param      : Factor w/ 8 levels "Arsenic","Calcium",..: 1 1 1 1 1 1 1 1 1
1 ...
  $ quant      : num  0.06 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 ...

   Now I can work on the commands I need.

Many thanks,

Rich