Re: [R] point.in.polygon help

I am looking at fish tagging data. I have gps coordinates of where each fish was tagged and released, and I have a map of 10 coastal basins of the state of Louisiana. I am trying to determine which basin each fish was tagged in. -- View this message in context: http://r.789695.n4.nabble.com/po

[R] point.in.polygon help

I am new to mapping with R, and I would like to use the point.in.polygon function from the sp package, but I am unsure of how to get my data in the correct format for the function. The generic form of the function is as follows: point.in.polygon(point.x, point.y, pol.x, pol.y, mode.checked=FALSE)

[R] how to sum multiple data entries for the same sampling event?

I'm having trouble with some catch per unit effort data (CPUE, fisheries data). Some of the samples were "retained" and some "unretained," and they are entered as 2 separate entries for the same sampling event (Date and time). I want to calculate the total CPUE (so sum the "retained" and "unretaine