Return the First to Last Part of a Data Object
Retrieve the first or last parts of a DGEList, DGEExat, DGEGLM, DGELRT or TopTags object.
## S3 method for class 'DGEList' head(x, n = 6L, ...) ## S3 method for class 'DGEList' tail(x, n = 6L, ...)
x |
an object of class |
n |
a single integer.
If positive or zero, number rows of resulting object.
If negative, all but the |
... |
other arguments are not currently used. |
head
(tail
) returns the first (last) n
rows when n >= 0
or all but the last (first) n
rows when n < 0
.
An object like x
but generally with fewer rows.
Gordon Smyth
head
in the utils package or head.EList
in the limma package.
Counts <- matrix(rpois(40,lambda=10),20,2) rownames(Counts) <- paste0("Gene",1:20) colnames(Counts) <- c("A","B") y <- DGEList(Counts) head(y) tail(y)
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