Displaying 2 results from an estimated 2 matches for "species7".
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2011 Jul 29
1
Using perm.t.test() upon Matrix/Dataframe columns parted by factor instead of t.test()
...graduate
problem.
Code:
c(rep("A", 5), rep("B", 5))->Faktor
matrix(rnorm(100, mean=20, sd=4), nrow=10, ncol=10)->M
colnames(M) <- c("species1","species2",
"species3","species4","species5","species6","species7","species8","species9",
"species10")
###Conventional T-Test to test for differences of each species per factor
lapply(
M, function(x)
t.test(x~ Faktor)
)
###Trying it for perm.t.test without the helpful formular expression.
Does not work
lapply(...
2005 Nov 03
4
merging dataframes
Dear List,
I often have to merge two or more data frames containing unique row
names but with some columns (names) common to the two data frames and
some columns not common. This toy example will explain the kind of setup
I am talking about:
mat1 <- as.data.frame(matrix(rnorm(20), nrow = 5))
mat2 <- as.data.frame(matrix(rnorm(20), nrow = 4))
rownames(mat1) <- paste("site",