[R] New reshape2 question

[Neotropical bat risk assessments]

Hi all,

Thanks go out to those who provided helpful suggestions last year with a 
similar issue.

I am working with a new data set and trying what I assumed was a simple 
aggregation in reshape2 but is not working.  I have a large number of 
similar data sets to run so getting the code correct is important.

I have tried this code line in bold (both plyr and reshape2 are loaded):

 > ChenaPond <- read.table("C:/Bat papers in prep/Chile/Data & 
analyses/ChenaPond.txt",header=T,sep="\t",quote="")
dat1<-ChenaPond
 >*res2<-ddply(dat1,.(Location,Species),summarize, Time=sum(Time))*

*Error in Summary.factor(c(3L, 4L, 5L, 15L, 39L, 45L, 18L, 24L, 25L, 
26L,  :
   sum not meaningful for factors*

Attached is the data.  Not sure why it is all factors and when I tried 
changing to double precision the times were corrupted.  I recall that R 
does not do well with time values.  Do I need a line using chron as well 
beforehand?

I even tried for several hours looking at the ReshapeGUI package to see 
what I may have been doing incorrectly to no avail.

 1. What I need to do to analyze all the data in another program is to
    reformat it so that I have a Species by Time matrix summarized in 5
    minute time blocks.  The result needs to be Species as rows, and
    time intervals are arranged chronologically in columns.
 2. Then I need the matrix converted such that each unique Species will
    have proportional abundances of time (0 to 100) so totals for each
    species should be the same (or 100%).


What do folks suggest?
Plyr, Reshape2 or try tables?

Thanks,

Bruce



-- 
Bruce W. Miller, PhD.
Neotropical bat risk assessments

If we lose the bats, we may lose much of the tropical vegetation and the lungs of the planet

Using acoustic sampling to map species distributions for >15 years.

Providing Interactive identification keys to the vocal signatures of New World Bats

For various project details see:

https://sites.google.com/site/batsoundservices/

-------------- next part --------------
Species	Location	Date	Time
Myochi	Chena  pond	5/26/09	18:38
Lascin	Chena  pond	5/26/09	18:51
Lascin	Chena  pond	5/26/09	19:38
Lascin	Chena  pond	5/26/09	19:39
Tadbra	Chena  pond	5/26/09	19:47
Lasvar	Chena  pond	5/26/09	20:12
Lasvar	Chena  pond	5/26/09	20:16
Lasvar	Chena  pond	5/26/09	20:56
Lascin	Chena  pond	5/26/09	21:19
Tadbra	Chena  pond	5/26/09	21:20
Lascin	Chena  pond	5/26/09	22:47
Lascin	Chena  pond	5/26/09	22:56
Lasvar	Chena  pond	10/15/09	20:51
Lasvar	Chena  pond	10/15/09	20:55
Lasvar	Chena  pond	10/15/09	20:56
Lasvar	Chena  pond	10/15/09	20:57
Lasvar	Chena  pond	10/15/09	20:59
Myochi	Chena  pond	10/15/09	21:00
Myochi	Chena  pond	10/15/09	21:26
Lascin	Chena  pond	10/15/09	21:29
Lasvar	Chena  pond	10/15/09	21:33
Lasvar	Chena  pond	10/15/09	21:34
Lasvar	Chena  pond	10/15/09	21:35
Myochi	Chena  pond	10/15/09	21:55
Lasvar	Chena  pond	10/15/09	21:56
Lascin	Chena  pond	10/15/09	21:59
Lascin	Chena  pond	10/15/09	22:00
Lascin	Chena  pond	10/15/09	22:01
Myochi	Chena  pond	10/15/09	22:03
Myochi	Chena  pond	10/15/09	22:08
Myochi	Chena  pond	10/15/09	22:08
Myochi	Chena  pond	10/15/09	22:09
Lascin	Chena  pond	10/15/09	22:17
Lasvar	Chena  pond	10/15/09	22:23
Lasvar	Chena  pond	10/15/09	22:24
Myochi	Chena  pond	10/15/09	22:26
Lasvar	Chena  pond	10/15/09	22:30
Lasvar	Chena  pond	10/15/09	22:31
Lascin	Chena  pond	10/15/09	22:42
Lasvar	Chena  pond	10/15/09	22:42
Lasvar	Chena  pond	10/15/09	22:44
Lascin	Chena  pond	10/15/09	22:46
Lascin	Chena  pond	10/15/09	22:49
Tadbra	Chena  pond	10/15/09	22:49
Lascin	Chena  pond	10/15/09	22:50
Lascin	Chena  pond	10/15/09	22:51
Lascin	Chena  pond	10/15/09	22:53
Lascin	Chena  pond	10/15/09	22:54
Lascin	Chena  pond	10/15/09	22:57
Lasvar	Chena  pond	10/15/09	23:01
Lasvar	Chena  pond	10/15/09	23:06
Lascin	Chena  pond	10/15/09	23:08
Lasvar	Chena  pond	10/15/09	23:09
Tadbra	Chena  pond	10/15/09	23:14
Myochi	Chena  pond	10/15/09	23:30
Myochi	Chena  pond	10/15/09	23:31
Lasvar	Chena  pond	10/15/09	23:33
Myochi	Chena  pond	10/15/09	23:35
Myochi	Chena  pond	10/15/09	23:35
Myochi	Chena  pond	10/15/09	23:38
Lasvar	Chena  pond	10/15/09	23:39
Lasvar	Chena  pond	10/15/09	23:44
Tadbra	Chena  pond	10/15/09	23:45
Lasvar	Chena  pond	10/15/09	23:47
Lasvar	Chena  pond	10/15/09	23:52
Lasvar	Chena  pond	10/15/09	23:59
Tadbra	Chena  pond	10/16/09	0:00