Displaying 2 results from an estimated 2 matches for "blok4".
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bloke
2010 Mar 22
1
maxNR - Error in p(a, b) : element 1 is empty; the part of the args list of '*' being evaluated was: (b, t)
...is to read the data from the website and then peform
maxNR on the function, F. Btw the version of R being used is "RGui for
Windows" if it helps to know this.
R-code below:
library(maxLik)
> require(maxLik)
>
> x <-
> read.table('http://www.math.ku.dk/kurser/2008-09/blok4/stat2/doku/data/Eksempel_6_3.txt',
> header = TRUE);
> t <- log(x$Koncentration);
> X <- x$Status;
>
> p <- function(a,b) exp(a+b*t)/(1+exp(a+b*t));
> S <- sum(X);
> SP <- sum(t*X);
>
> F <- function(a,b) {
+ c(sum(p(a,b)) - S,
+ sum(t*p(...
2007 May 24
1
"[RODBC] ERROR: Could not SQLExecDirect"
Hi, everyone,
I try to run as follows:
Z>library("RODBC")
Z>cnct<-odbcConnectExcel("Forbes2000.xls")
Z>cnct
RODB Connection 1
Details:
case=nochange
DBQ=C:\Program Files\R\R-2.5.0\Forbes2000.xls
DefaultDir=C:\Program Files\R\R-2.5.0
Driver={Microsoft Excel Driver (*.xls)}
DriverId=790
MaxBufferSize=2048
PageTimeout=5
Z>sqlQuery(cnct, "select