Greetings from an R newbie
Table imported with 4 columns containing Dates and Times, I desire to
determine the differences between said columns
Have loaded the base and chron packages for R commander. Have tried to
use format but without success. Have tried the Postix commands but
error states "unused argument (s) (...)", even though some of the
examples do not use (...) at the end of the command
Example:
Table is named GvY1
Operation.Time.End Operation.Time.Dictated
Operation.Time.Verfiy
7/10/2004 10:10:12 7/12/2004 9:18:03
7/28/2004 05:00:02
Information is mm/dd/year hh:mm:ss (time of day, e.g. the first column
is July 10th 2004 10:10 AM at 12 seconds)
What is the best way to get the difference between any of the 2 columns?
And eventually test statistics on the columns (eg. P values, if needed,
but not a priority at this time)
Thanks in advance
Platform WinXP
IBM T40p
R v 1.8.1
R commander
--
Mark R Laflamme,MD
Regenstrief Institute
1050 Wishard Blvd RG5
Indianapolis, IN 46202
317 630-7833
Greetings from an R newbie
Table imported with 4 columns containing Dates and Times, I desire to
determine the differences between said columns
Have loaded the base and chron packages for R commander. Have tried to
use format but without success. Have tried the Postix commands but
error states "unused argument (s) (...)", even though some of the
examples do not use (...) at the end of the command
Example:
Table is named GvY1
Operation.Time.End Operation.Time.Dictated
Operation.Time.Verfiy
7/10/2004 10:10:12 7/12/2004 9:18:03
7/28/2004 05:00:02
Information is mm/dd/year hh:mm:ss (time of day, e.g. the first column
is July 10th 2004 10:10 AM at 12 seconds)
What is the best way to get the difference between any of the 2 columns?
And eventually test statistics on the columns (eg. P values, if needed,
but not a priority at this time)
Thanks in advance
Platform WinXP
IBM T40p
R v 1.8.1
R commander
--
Mark R Laflamme,MD
Regenstrief Institute
1050 Wishard Blvd RG5
Indianapolis, IN 46202
317 630-7833
Mark R Laflamme, MD <mlaflamme <at> regenstrief.org> writes: : : Greetings from an R newbie : : Table imported with 4 columns containing Dates and Times, I desire to : determine the differences between said columns : Have loaded the base and chron packages for R commander. Have tried to : use format but without success. Have tried the Postix commands but : error states "unused argument (s) (...)", even though some of the : examples do not use (...) at the end of the command : : Example: : Table is named GvY1 : Operation.Time.End Operation.Time.Dictated : Operation.Time.Verfiy : 7/10/2004 10:10:12 7/12/2004 9:18:03 : 7/28/2004 05:00:02 : : Information is mm/dd/year hh:mm:ss (time of day, e.g. the first column : is July 10th 2004 10:10 AM at 12 seconds) : What is the best way to get the difference between any of the 2 columns? : And eventually test statistics on the columns (eg. P values, if needed, : but not a priority at this time) : Thanks in advance : : Platform WinXP : IBM T40p : R v 1.8.1 : R commander : Often problems with data frames are due to storing the data as factors rather than in a datetime class but without a reproduceable example its impossible to know for sure. You might be able to solve this yourself by reading the article on dates and times in R News 4/1.