-----Original Message-----
From: aguitatierra at hotmail.com
Sent: Sun, 2 Feb 2014 13:32:57 +0100
To: r-help at r-project.org
Subject: [R] aggregate()?
Hi all,
I'm trying to compute a mean on my data but I'm struggling with 2
things: 1. getting the right layout and 2. including the missing values
in the outcome.
#Input data:
Stock <- c("A", "A", "A", "A", "A", "A", "B", "B", "B", "B", "B", "B")
Soil <- c("Blank", "Blank", "Control", "Control", "Clay", "Clay",
"Blank", "Blank", "Control", "Control", "Clay", "Clay")
Nitrogen <- c(NA, NA, 0, 0, 20, 20, NA, NA, 0, 0, 20, 20)
Respiration <- c(112, 113, 124, 126, 139, 137, 109, 111, 122, 124, 134,
136)
d <- as.data.frame(cbind(Stock, Soil, Nitrogen, Respiration))
#Outcome I'd like to get:
Stockr <- c("A", "A", "A", "B", "B", "B")
Soilr <- c("Blank", "Control", "Clay", "Blank", "Control", "Clay")
Nitrogenr <- c(NA, 0, 20, NA, 0, 20)
Respirationr <- c(111, 125, 138, 110, 123, 135)
result <- as.data.frame(cbind(Stockr, Soilr, Nitrogenr, Respirationr))
Many thanks in advance for your help!
Cheers,
Bea