Ok let me clarify

I have multidimensional array and I need to convert it to a singular
dimensional array.
The multidimensional array is 359 rows, 2 cols, 3 deep
I need to run a regression model mymatrix[1,1,1:3] and mymatrix [1,2,1:3]

This is my current error, which indicates I have the incorrect list type (I
have tried functions as.list, as.vector, as.vector)

lm(formula = mymatrix[1,1,1:3]~mymatrix[1,2,1:3] )
Error in model.frame.default(formula = mymatrix[1, 1, 1:3] ~ mymatrix[1,  :
  invalid type (list) for variable 'mymatrix[1, 1, 1:3]'


I was unsuccessful at attempting the "str(mymatrix[1,1,1:3]" --Argument not
valid model

The data.frame function did not create the objects
<- data.frame(a=mymatrix[1,1,1:3], b=mymatrix[1,2,1:3])
> lm(a~b, data=df)
Error in eval(expr, envir, enclos) : object 'a' not found

Here is my code
con <- dbConnect(PostgreSQL(), user="postgres",
password="antione",dbname="Education")
rs <- dbGetQuery(con, "SELECT (GRADE1[10]) As grade1_t1, (GRADE1[11]) As
grade1_t2, (GRADE1[12]) As grade1_t3, (GRADE2[11]) As grade2_t2,
(GRADE2[12]) As grade2_t3, (GRADE2[13]) As grade2_t4 FROM attending")
myval <- rs
attach(myval)
names(myval)
dim(myval)

mymatrix <- array(myval, c(379,2,3))

mymatrix[,1,1] <- grade1_t1
mymatrix[,1,2] <- grade1_t2
mymatrix[,1,3] <- grade1_t3
mymatrix[,2,1] <- grade2_t2
mymatrix[,2,2] <- grade2_t3
mymatrix[,2,3] <- grade2_t4

I can do this
plot(mymatrix[1,1,1:3],mymatrix[1,2,1:3])

On Fri, Nov 25, 2011 at 6:06 AM, Bert Gunter [via R] <
ml-node+s789695n4107159h96@n4.nabble.com> wrote:

> Inline below.
>
> -- Bert
>
> On Fri, Nov 25, 2011 at 2:31 AM, Milan Bouchet-Valat <[hidden email]<http://user/SendEmail.jtp?type=node&node=4107159&i=0>>
> wrote:
>
> > Le vendredi 25 novembre 2011 à 00:02 -0800, Dhaynes a écrit :
> >> Hello,
> >>
> >> I am new to R.
> >> I have multidimensional array (379,2,3) and I need to create a series
> of
> >> linear regressions (379 to be exact)
> >> I have the array stored properly I believe, but I can not use the
> >> lm(myarray[1,1,1:3]~myarray[1,2,1:3])
> >> I have checked to make sure they are exactly the same length.
> >> I have also tried endlessly to convert the subset of the array back
> into a
> >> vector.
>
> ?as.vector
> Actually an array **is** a vector -- but with an additional "dim"
> attribute. Try:
> >str(x)
>
>
> >>
> >> any help would be appreciated.
>
> 1) Read relevant portions of R docs, like ?array and perhaps "An
> Introduction to R."
>
> 2)  Read and follow the posting guide. In particular, give us a toy
> example with the code you used to construct your array. It's difficult
> to diagnose the source of engine failure without the car.
>
> 3) See my comment below.
>
> > The 'formula' argument of lm doesn't take actual values, but variable
> > names. So you need to create vectors containing your data, or pass a
>
> --This is patently false. Please check before giving obviously wrong
> advice:
>
> > x <- array(rnorm(150), dim= c(10,5,3))
> > lm(x[,3,2] ~x[,1,1])
>
> Call:
> lm(formula = x[, 3, 2] ~ x[, 1, 1])
>
> Coefficients:
> (Intercept)    x[, 1, 1]
>     -0.1247       0.1171
>
>
>
>
>
> > data frame with these vectors are columns. So, going the latter way :
> > df <- data.frame(a=myarray[1,1,1:3], b=myarray[1,2,1:3])
> > lm(a ~ b, data=df)
> >
> > or in one step
> > lm(a ~ b, data=data.frame(a=myarray[1,1,1:3], b=myarray[1,2,1:3]))
> >
> >
> > Regards
> >
> > ______________________________________________
> > [hidden email] <http://user/SendEmail.jtp?type=node&node=4107159&i=1>mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
>
>
>
> --
>
> Bert Gunter
> Genentech Nonclinical Biostatistics
>
> Internal Contact Info:
> Phone: 467-7374
> Website:
>
> http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm
>
> ______________________________________________
> [hidden email] <http://user/SendEmail.jtp?type=node&node=4107159&i=2>mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>
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