R help - Apr 2009 - help regarding converting the available date in "right" date

Dear R users, 

I have a table with say three columns and 70 rows. 
The second column has dates in format dd.mm.yy (i.e. 01.10.07 indicating
record for October 1, 2007). 
I read the text file, containing the records. Now, I want to find out the
weekday for each date. 
However, I cannot do so. 

1) 
If I type result[1,"Date"] to see the Date in the first row, I get
following
output: 
70 Levels: 01.10.07 01.11.07 02.10.07 02.12.07.. and so on. 

2) 
If I use any functions related to Date or time, I get the message: character
string is not in a standard unambigious format. 
:-( 

I can understand that first I have to "convert" the existing date
format to
such a format that R "recognizes" as date format. However, I am not
able to
do so. 

I did try to use format.Date() and as.Date() functions. However, no success. 
I am making some silly mistake. 
Please help. 


Thank you. 

Best Regards, 
Suresh 

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Sent from the R help mailing list archive at Nabble.com.

I have answered almost the same question a few minutes ago.

Why do you send questions more than once? It won't make responses 
quicker but will confuse people who spend their time in answering 
messages who do not see that the questions is already answered in 
another thread!!!!

Uwe Ligges



Suresh_FSFM wrote:
> Dear R users, 
> 
> I have a table with say three columns and 70 rows. 
> The second column has dates in format dd.mm.yy (i.e. 01.10.07 indicating
> record for October 1, 2007). 
> I read the text file, containing the records. Now, I want to find out the
> weekday for each date. 
> However, I cannot do so. 
> 
> 1) 
> If I type result[1,"Date"] to see the Date in the first row, I
get following
> output: 
> 70 Levels: 01.10.07 01.11.07 02.10.07 02.12.07.. and so on. 
> 
> 2) 
> If I use any functions related to Date or time, I get the message:
character
> string is not in a standard unambigious format. 
> :-( 
> 
> I can understand that first I have to "convert" the existing date
format to
> such a format that R "recognizes" as date format. However, I am
not able to
> do so. 
> 
> I did try to use format.Date() and as.Date() functions. However, no
success.
> I am making some silly mistake. 
> Please help. 
> 
> 
> Thank you. 
> 
> Best Regards, 
> Suresh 
>