Displaying 1 result from an estimated 1 matches for "ch4_leak".
2012 May 23
2
Using NA as a break point for indicator variable?
Hi all,
I am working with a spatial data set for which I am only interested in high
concentration values ("leaks"). The low values (< 90th percentile) have
already been turned into NA's, leaving me with a matrix like this:
< CH4_leak
lon lat CH4
1 -71.11954 42.35068 2.595834
2 -71.11954 42.35068 2.595688
3 NA NA NA
4 NA NA NA
5 NA NA NA
6 -71.11948 42.35068 2.435762
7 -71.11948 42.35068 2.491003
8 NA NA NA
9...