[R] gantt chart for dataset

David Winsemius dwinsemius at comcast.net
Fri Aug 21 16:40:00 CEST 2009

On Aug 21, 2009, at 9:19 AM, rajclinasia wrote:

> hi,
> Thanks for responding of gantt charts. but i have some problem  
> regarding
> with gantt charts. i.e.
> Ymd.format <- "%Y/%m/%d"
> Ymd <- function(x){ as.POSIXct(strptime(x, format=Ymd.format))}
> gantt.info <- list(
>  labels     =c("First task","Second task","Third task","Fourth  
> task","Fifth
> task"),
>  starts
> = 
> Ymd 
> (c("2004/01/01","2004/02/02","2004/03/03","2004/05/05","2004/09/09")),
>  ends
> = 
> Ymd 
> (c("2004/03/03","2004/05/05","2004/05/05","2004/08/08","2004/12/12")),
>  priorities =c(1,2,3,4,5))
> gantt.chart(gantt.info,main="Calendar date Gantt chart")
> the above code is fworking for individual varibale, that variables  
> we have
> to specify manually for each variable.
> but my question is assume that above data stored in a excel file  
> 'sample'.
> now i want gantt chart for the 'sample' dataset.

It appears that you need to avail yourself of the introductory  
material that is on CRAN and pay particular attention to descriptions  
of the transfer of information from Excel to R. While it is possible  
to read Excel files from R, you have provided none of the information  
needed to allow specific advice on that point. Creation of a tab  
separated or comma separated file from Excel and reading into R is a  
rather generic approach for such transfers and would be the most  
advisable for an R-newbie to use. Once you have mastered that basic  
procedure, you should come back to the help-list with specific code  
and specific examples showing what you have tried and where you got  
stuck (with complete copies of the console output).

http://cran.r-project.org/manuals.html  #in particular "R Data Import/ 

(With R-help there is an expectation that you _first_ read the manuals  
_and_ spend time working the examples you will find there. _Then_ post  


David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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