Hi, I have the following file, and I need to work out the linear
regression for each sample. I tried the model(*) and receive the error
message (**):
> data=split(mydata,rep(1:(nrow(mydata)/6),each=6))
> arrang.linear=lapply(data,lm,formula=KA~PA)
Erro em storage.mode(y) <- "double" :
invalid to change the storage mode of a factor
Além disso: Warning message:
In model.response(mf, "numeric") :
using type="numeric" with a factor response will be ignored
SAMPLE PA KA
2 0.917 11.261
2 0.823 11.010
2 0.803 10.381
2 0.744 10.208
2 0.697 10.006
2 0.681 9.916
3 0.789 10.271
3 0.702 10.076
3 0.692 9.990
3 0.646 9.779
3 0.620 9.749
3 0.608 9.708
4 1.052 11.779
4 0.941 11.249
4 0.881 10.140
4 0.824 10.052
4 0.790 9.859
. . .
. . .
. . .
80 0.499 9.819
Sueli Rodrigues
Eng. Agrônoma - UNESP
Mestranda - USP/ESALQ
PPG-Solos e Nutrição de Plantas
Fones (19)93442981
(19)33719762
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