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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