[R] Adapting R code for different traps

[bjmjarrett]

Hi Jon,

Sorry about the lack of information. I'll give the data from one of my
traps:
(nb. all of the data for each trap is referenced to the start day of the
trap. ie ACAP1 started collecting at day 0 but parasitoid releases occurred
266, 259, 225 etc days before collecting took place)

Trap	collection.days.2	release.days  days.since.last.release
ACAP1	0	            -266                   -12 # this tells me that at day 0
the last parasitoid release 
                                                                     
occurred 12 days beforehand, and so on...
ACAP1	9	            -259                    -1  
ACAP1	28	            -225                   -20
ACAP1	41	            -216                   -13
ACAP1	77	             -28                    -36
ACAP1	97	             -12                    -20
ACAP1	106	               0                     -1
ACAP1	125	               8                     -20
ACAP1	146	              28                    -21
ACAP1	168	              41                    -43
ACAP1	195	              77                    -70       
ACAP1	217	              97                    -92      
ACAP1	259	             105                    -134     
ACAP1	288	             125                    -163      
ACAP1	311	             288                     -23     
ACAP1	337 	             311                     -26        
ACAP1	378	             337                     -41      
ACAP1	400	             378                      -22      
ACAP1	440	             400                      -26     
ACAP1	464	             414                      -14    

The output I want is days.since.last.release for all of the traps I have.

Thanks so much,

Ben

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