Displaying 2 results from an estimated 2 matches for "lithclass".
2011 Jan 18
3
tips for looping over a category for beginner
...amples in each
lithology class. this is how i'm doing it now:
> tc = read.table(....)
> attach(tc)
> names(tc)
tc = [1] "Well" "Depth" "Latitude"
"Longitude"
[5] "Formation" "Lithology" "LithClass" "CondUncert"
[9] "sample.ID" "Conductivity" "Density" "Porosity"
> plot(Depth[LithClass=='sand'], Conductivity[LithClass=='sand'])
(ad nauseum... how can I loop through them all?)
and ...
> boxplot(Co...
2011 Jan 19
1
Using subset to filter data table
I am having difficulty understanding how I would constrain a data set by
filtering out 'records' based on certain criteria.
Using SQL I could query using 'select * from my.data where LithClass in
('sand', 'clay')' or some such.
Using subset, there seem to be ghosts left behind (that is, all of the
LithClass *.Labels* remain after subset)
> dput(tcc)
structure(list(Density = c(1.84, 1.91, 2, NA, 1.95, 2.04, 2.11,
1.85, 1.97, 2, 2.27, NA, NA, 2.18, NA, NA, 1.9, 2....