Don MacQueen
Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062
On 7/10/12 12:54 PM, "Rich Shepard" <rshepard at appl-ecosys.com> wrote:
> 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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