I have a very large file with many rows and columns. I want to create a plot
with lowess.
If I try the following it works fine:
data(PrecipGL)
plot(PrecipGL)
lines(lowess(time(PrecipGL),PrecipGL),lwd=3, col=2)
In my file, 2 columns are "nox" and "sdate", and are both typeof() = double.
If I issue command
Plot(nox~sdate)
I can get a nice plot.
However if I try
lines(lowess(time(nox~sdate),nox~sdate),lwd=3, col=2)
it returns an error that it is not a matrix
if I try to extract these 2 columns into a matrix
mdat <- matrix(date,nox, byrow=TRUE)
doesn't work, and search for help did not work, so am posting.
Obviously I am a newbee here. Thanks for any help!!
Gregory A. Graves
Lead Scientist
REstoration COoordination and VERification (RECOVER) Division
Everglades Restoration Resource Area
South Florida Water Management District
Phones: DESK: 561 / 681 - 2563 x3730
CELL: 561 / 719 - 8157
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