CALIB (version 1.38.0)

dim: Retrieve the Dimensions of an RGList\_CALIB or SpikeList object

Description

Retrieve the number of rows (genes) and columns (arrays) for an RGList\_CALIB or SpikeList

Usage

"dim"(x) "length"(x)

Arguments

x

an object of class RGList_CALIB or SpikeList.

Value

Numeric vector of length 2. The first element is the number of rows(genes) and the second is the number of columns(arrays).

Details

Microarray data objects share many analogies with ordinary matrices in which the rows correspond to spots or genes and the columns to arrays. These methods allow one to extract the size of microarray data objects in the same way that one would do for ordinary matrices.

A consequence is that row and column commands nrow(x), ncol(x) and so on also work.

References

dim in limma package

See Also

dim in the base package

dim in the limma package

Examples

# for RGList_CALIB
R <- G <- matrix(1:8,4,2)
rownames(R) <- rownames(G) <- c("g1","g2","g3","g4")
colnames(R) <- colnames(G) <- c("a1","a2")
RG <- new("RGList_CALIB",list(R=R,G=G))

dim(RG)

# for SpikeList
SR <- SG <- matrix(1:8,4,2)
rownames(SR) <- rownames(SG) <- c("s1","s2","s3","s4")
colnames(SR) <- colnames(SG) <- c("a1","a2")
spike <- new("SpikeList",list(R=SR,G=SG))

dim(spike)