[R] error in creating gantt chart.
dwinsemius at comcast.net
Mon Aug 24 15:43:20 CEST 2009
On Aug 24, 2009, at 8:22 AM, rajclinasia wrote:
> hi every one,
> i have a excel sheet like this
> labels starts ends
> 1 first task 1-Jan-04 3-Mar-04
> 2 second task 2-Feb-04 5-May-04
> 3 third task 3-Mar-04 6-Jun-04
> 4 fourth task 4-Apr-04 8-Aug-04
> 5 fifth task 5-May-04 9-Sep-04
> now i converted this excel sheet into csv file and i read the csv
> file into
> R with the below code.
> my.gantt.info<-read.csv("C:/Documents and
> my.gantt.info<-read.csv(textConnection(" labels starts
+ 1 first task 1-Jan-04 3-Mar-04
+ 2 second task 2-Feb-04 5-May-04
+ 3 third task 3-Mar-04 6-Jun-04
+ 4 fourth task 4-Apr-04 8-Aug-04
+ 5 fifth task 5-May-04 9-Sep-04"))
1 1 first task 1-Jan-04 3-Mar-04
2 2 second task 2-Feb-04 5-May-04
3 3 third task 3-Mar-04 6-Jun-04
4 4 fourth task 4-Apr-04 8-Aug-04
5 5 fifth task 5-May-04 9-Sep-04
So that may look successful to you but that data.frame contains all of
that data in a single (character) column. Why? Because a function was
expecting commas on a file that did not have any. You will probably
get further along if you use read.table with header=TRUE. Maybe you
did something different or the file did have commas. With such a small
file, you really should present the results of
That will contain all the values and attributes of the R object ...
no more guessing, which is what we are doing now.
> and for create gantt chart i used below code.
That looks wrong. my.gantt.info is an R object. Is gantt.chart (from
whatever unspecified package) really expecting to have its arguments
quoted? I would bet against that possibility.
I would also guess that, even if the data input issues are not a
problem and the quotes are removed, you still have not converted those
character values that you think look like dates into objects that R
will interpret as dates.
> if i run this above code i am getting the error like this
> Error in x$starts : $ operator is invalid for atomic vectors.
> can anybody help in this aspect it would be very appreciable.
> Thanks in Advance.
David Winsemius, MD
West Hartford, CT
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