Dear R users,
I want to group the d values in classes. If I use this script I have a
problem.
classes <- function(x, n){
s <- seq(0, ceiling(max(x)), by = n)
factor(n*findInterval(x, s), levels = s)
}
z<-sapply(tapply(t$d,t$plot,function(x) classes(t$d, 4)),table)
z<-cbind(z)
Thank you!
Initial data:
nr x y d plot plotn xplot yplot
121 162 50.26989 46.230 55.00 1 NA NA NA
120 160 43.05703 41.096 12.50 2 NA NA NA
1211 162 50.26989 46.230 55.00 2 NA NA NA
143 130 48.29959 59.406 42.00 2 NA NA NA
144 131 49.56329 55.866 79.50 2 NA NA NA
145 161 55.20783 50.046 79.75 2 NA NA NA
146 163 55.51600 51.860 40.75 2 NA NA NA
147 164 58.28660 52.787 13.25 2 NA NA NA
92 200 46.71426 38.114 20.75 3 92 15 95
93 193 56.97232 39.945 77.75 3 93 25 95
--
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Catalin-Constantin ROIBU
Forestry engineer, PhD
Forestry Faculty of Suceava
Str. Universitatii no. 13, Suceava, 720229, Romania
office phone +4 0230 52 29 78, ext. 531
mobile phone +4 0745 53 18 01
+4 0766 71 76 58
FAX: +4 0230 52 16 64
silvic.usv.ro
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