On 13.05.2011 11:38, romzero wrote:
Hi,
this is my R-Script
library(pls)
file<- "C:\\TXT\\brix.txt"
d<- as.matrix(read.table(file, header=T, sep=",", row.names = NULL))
plsdata<- data.frame(NIR=c(1:nrow(X)))
plsdata$NIR<- I(d[,3:603])
plsdata$Brix<- d[,2]
results<- plsr(Brix ~ NIR, data=plsdata)
after the last string i have this error
results<- plsr(Brix ~ NIR, data=plsdata)
Error in `[[<-.data.frame`(`*tmp*`, i, value = c(302053L, 305882L, 292704L,
:
replacement has 448346 rows, data has 746
In addition: Warning message:
In model.matrix.default(mt, mf) : variable 'Brix' converted to a factor
the data table have this structure
str(plsdata)
'data.frame': 746 obs. of 2 variables:
$ NIR : 'AsIs' chr [1:746, 1:601] "0.0011030396" "0.0013019324"
"0.0005979965" "0.0012952804" ...
..- attr(*, "dimnames")=List of 2
.. ..$ : NULL
.. ..$ : chr "X1100.0" "X1102.0" "X1104.0" "X1106.0" ...
$ Brix: chr "24.4" "24.8" "24.7" "20.1" ...
All your data are character rather than numeric. If you fo not transform
the data.frame to a matrix at the very beginning after reading the
data.frame, things should be fine, I guess (untested, since we do not
have the data).
Uwe Ligges
where am I wrong?
thanks for help
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