dim: Retrieve the Dimensions of an RGList\_CALIB or SpikeList...
In CALIB: Calibration model for estimating absolute expression levels from microarray data

Description Usage Arguments Details Value Author(s) References See Also Examples

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

 ## S3 method for class 'RGList_CALIB'
dim(x)
 ## S3 method for class 'RGList_CALIB'
length(x)

`x`	an object of class `RGList_CALIB` or `SpikeList`.

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.

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

Hui Zhao

dim in limma package

dim in the base package

dim in the limma package

# 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)