search for: may06

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2008 Apr 29
1
merging multiple data frames with different numbers of rows
...of the river miles that can occur in all of the data frames that I want to put together feb06 <- structure(list(RiverMile = c(202L, 190L, 185L), X2.1.06 = c(2850000, NA, NA)), .Names = c("RiverMile", "X2.1.06"), row.names = c(29L, 31L, 32L), class = "data.frame") may06 <- structure(list(RiverMile = c(202L, 198L, 190L, 185L, 148L), X5.1.06 = c(NA_real_, NA_real_, NA_real_, NA_real_, NA_real_)), .Names = c("RiverMile", "X5.1.06"), row.names = c(29L, 30L, 31L, 32L, 34L), class = "data.frame") jun06 <- structure(list(RiverMile =...
2008 Apr 29
1
data management (subsetting and recombining)
...s the easiest way to proceed as this is a process that will be done on 96+ constituents? feb06 <- structure(list(RiverMile = c(202L, 190L, 185L), X2.1.06 = c(2850000, NA, NA)), .Names = c("RiverMile", "X2.1.06"), row.names = c(29L, 31L, 32L), class = "data.frame") may06 <- structure(list(RiverMile = c(202L, 198L, 190L, 185L, 148L), X5.1.06 = c(NA_real_, NA_real_, NA_real_, NA_real_, NA_real_)), .Names = c("RiverMile", "X5.1.06"), row.names = c(29L, 30L, 31L, 32L, 34L), class = "data.frame") merge(feb06, may06, by="RiverMile&q...