[R] Understanding cenros Error
Rich Shepard
rshepard at appl-ecosys.com
Tue Jul 10 21:54:24 CEST 2012
Before reading water chemistry into a data frame I removed all missing
data. Yet when I try to run cenros() to summarize a specific chemical I get
an error that I do not understand:
with( subset(chem, param=='Ag'), cenros(quant,ceneq1) )
Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) :
NA/NaN/Inf in 'y'
I would like to learn what I did incorrectly so I can avoid these errors
in the future.
The data frame structure is
str(chem)
'data.frame': 120309 obs. of 8 variables:
$ site : Factor w/ 65 levels ";Influent","D-1",..: 2 2 2 2 2 2 ...
$ sampdate: Date, format: "2007-12-12" "2007-12-12" ...
$ preeq0 : logi TRUE TRUE TRUE TRUE TRUE TRUE ...
$ param : Factor w/ 37 levels "Ag","Al","Alk_tot",..: 1 2 8 17 3 9 ...
$ quant : num 0 0.106 1 231 231 0.011 0 0.002 0 100 ...
$ ceneq1 : logi FALSE FALSE TRUE FALSE FALSE FALSE ...
$ floor : num 0 0.106 0 231 231 0.011 0 0 0 100 ...
$ ceiling : Factor w/ 3909 levels "0.000","0.000)",..: 1 116 841 1771 ...
I ran dput() on the data frame but cannot make sense of the output (a 5.5M
ASCII text file).
Pointers appreciated.
Rich
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