"Utkarsh Singhal" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Hi R,
> I have an excel file in which the third column is "date" and others are
> "character" and "numeric".
>
> If I use this to read the file in R: x = read.xls("D:\\file.xls")
>
> The problem is that my date column is read in julian dates.
RDOBC has its problems when all data in a column are not exactly the same
data type, but can read dates:
Consider an Excel file with the following: (view with fixed-width font):
Index Label1 Date Number Label2 Mixed1 Mixed2
1 A 3/1/2008 12.45 X 1 A
2 B 3/2/2008 14.76 Y 2 B
3 C 3/3/2008 10.99 Z A 1
4 D 3/4/2008 3.14 B 2
Use this to read the excel worksheet "Sheet1":
library(RODBC)
connection <- odbcConnectExcel("C:/temp/Sample.xls")
d <- sqlFetch(connection, "Sheet1")
odbcClose(connection)
d
class(d$Date)
> d
Index Label1 Date Number Label2 Mixed1 Mixed2
1 1 A 2008-03-01 12.45 X 1 NA
2 2 B 2008-03-02 14.76 Y 2 NA
3 3 C 2008-03-03 10.99 Z NA 1
4 4 D 2008-03-04 3.14 <NA> NA 2
> class(d$Date)
[1] "POSIXt" "POSIXct"
efg
Earl F. Glynn
Bioinformatics
Stowers Institute for Medical Research
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