westland <westl...@uic.edu> writes:
> Here is the dput(eqn) and showData for the file 'eqn':
[...]
>> showData(eqn)
>
> depy.w depy.h depy.d depy.s indx.a indx.i indx.r indx.x
> 63 55 1 0 44 37200 4 0
> 145 52 1 1 33 69300 4 1
> 104 32 0 1 68 56900 3 1
> 109 69 1 1 94 44300 6 1
> 221 61 0 1 72 79800 6 0
> 110 40 1 1 48 17600 5 1
> 194 41 0 0 85 58100 4 0
> 120 76 1 1 19 76700 3 0
> 210 61 0 0 41 37600 1 0 ... etc.
Okay, let me guess: you took the data in the file pls, created a data
frame eqn with two matrices in it, then used write.table() to write
eqn to a file, and then read it back with read.table().
If that is so, the problem you have is that write.table() will separate
the coloumns of the matrices into separate coloumns in the file (it
really has no other choice), and then read.table() will of course read
those in as separate coloumns again.
You have two solutions:
1) Repeat the commands to recreate the eqn data frame as a a data frame
with matrices, after reading it in from file:
eqn <- data.frame(depy = I(as.matrix(eqn[,1:4])),
indx = I(as.matrix(eqn[,5:8])))
2) Save the data frame in an .RData file with save() instead of as a
text file with write.table(). That will keep the structure of the
variable.
>
>
>
> Initially, I had input a file 'pls' with the script:
>
> dep <- pls[,1:4]
> ind <- pls[,5:8]
> eqn <- data.frame(depy = dep, indx = ind)
> apls <- plsr(depy ~ indx, data=eqn)
>
> .... and this gives me [7] ERROR: object 'depy' not found
because you are missing the I(as.matrix()).
--
Regards,
Bjørn-Helge Mevik
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