Hi there fellow R-users, 

I have just upgraded to R version 1.9.0 from R version 1.7.1 for Windows. 

Im trying to use the loess smoother where the X-variable is an as.POSIXct
variable.
The following works fine with R1.7.1 but not with R1.9.0.

Here is the example:


dates<-c('2003-08-03','2003-08-10','2003-08-17','2003-08-24','2003-08-31','2
003-09-07','2003-09-14','2003-09-21','2003-09-28','2003-10-05','2003-10-12',
'2003-10-19','2003-10-26','2003-11-02','2003-11-09','2003-11-16','2003-11-23
','2003-11-30','2003-12-07','2003-12-14','2003-12-21','2003-12-28','2004-01-
04','2004-01-11','2004-01-18','2004-01-25','2004-02-01','2004-02-08','2004-0
2-15','2004-02-22','2004-02-29','2004-03-07','2004-03-14','2004-03-21','2004
-03-28','2004-04-04','2004-04-11','2004-04-18','2004-04-25','2004-05-02')

length(dates)

strptime(dates,format="%Y-%m-%d")

length(strptime(dates,format="%Y-%m-%d"))

my.df<-data.frame(Sales=rnorm(40),Dates=as.POSIXct(strptime(dates,format="%Y
-%m-%d")))
my.df

loess(Sales~Dates,my.df)


I get the following error with version 1.9.0 
#Error: NA/NaN/Inf in foreign function call (arg 2)
#In addition: Warning messages: 
#1: longer object length
#        is not a multiple of shorter object length in: cl == c("Date",
"POSIXct", "POSIXlt") 
#2: NAs introduced by coercion 

Can anyone help???



Dr Wayne R. Jones
Senior Statistician / Research Analyst
KSS Limited
St James's Buildings
79 Oxford Street
Manchester M1 6SS
Tel: +44(0)161 609 4084
Mob: +44(0)7810 523 713




KSS Ltd
Seventh Floor  St James's Buildings  79 Oxford Street  Manchester  M1 6SS  England
Company Registration Number 2800886
Tel: +44 (0) 161 228 0040	Fax: +44 (0) 161 236 6305
mailto:kssg@kssg.com		http://www.kssg.com


The information in this Internet email is confidential and m...{{dropped}}


