Displaying 2 results from an estimated 2 matches for "coluimn".
2008 Jun 02
2
merging two data sets with no column header
I have two data sets data1 and data2 with no column names( No header). The
first coluimn in both data sets represents the case ID. How can I tell R to
merge the two data sets by the case ID if there is no header? Also, In data1
I have more cases and I would like the result of the merge to have all the
cases in both data1 and data2. there may be some duplicate cases.
I appreciate if so...
2009 Jul 07
3
Error due to non-conformable arrays
Hello,
Consider this function for generalized ridge regression:
gre <- function (X,y,D){
n <- dim(X)[1]
p <- dim(X)[2]
intercept <- rep(1, n)
X <- cbind(intercept, X)
X2D <- crossprod(X,X)+ D
Xy <- crossprod(X,y)
bth <- qr.solve(X2D, Xy)
}
# suppose X is an (nxp) design matrix and y is an (nx1) response vector
p <- dim(x)[2]
D<- diag(rep(1.5,p))
bt