Hi R -Users
I am sorry for bothering you. I was wondering what script can work to calculate
an immigration and extinction from two tables (time 1 and time 2). I could
easily calculate them in the Excel for small data set, but I have very big
data set. so that I was wondering to use R for this calculation. But I could
not figure it out to write these logical function in R. Would you provide me
some hints?
For example, I have these two tables
speciesTime1<-structure(list(site = 1:4, sp1 = c(0L, 1L, 1L, 0L), sp2 = c(0L,
1L, 1L, 0L), sp3 = c(1L, 0L, 1L, 0L)), .Names = c("site", "sp1",
"sp2", "sp3"), class = "data.frame", row.names = c(NA, -4L))
speciesTime2<-structure(list(site = 1:4, sp1 = c(1L, 0L, 1L, 1L), sp2 = c(0L,
1L, 1L, 1L), sp3 = c(1L, 1L, 0L, 1L)), .Names = c("site", "sp1",
"sp2", "sp3"), class = "data.frame", row.names = c(NA, -4L))
>From these two tables: I wanted to make the following two tables (Imm and Exti]
[Imm means number of "sp" present in speciesTime2, but not in speciesTime1]
imm<-structure(list(sp1 = c(1L, 0L, 0L, 1L), sp2 = c(0L, 0L, 0L, 1L
), sp3 = c(0L, 1L, 0L, 1L), sum = c(1L, 1L, 0L, 3L)), .Names = c("sp1",
"sp2", "sp3", "sum"), class = "data.frame", row.names = c(NA,
-4L))
[Exti=number of "sp" absent in speciesTime2, but present in speciesTime1]
Exti<-structure(list(sp1 = c(0L, 1L, 0L, 0L), sp2 = c(0L, 0L, 0L, 0L
), sp3 = c(0L, 0L, 1L, 0L), sum = c(0L, 1L, 1L, 0L)), .Names = c("sp1",
"sp2", "sp3", "sum"), class = "data.frame", row.names = c(NA,
-4L))
Thanks
KG
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