Coerce a single-channel QPTIFFImage to a matrix

Drops the singleton channel dimension and returns a plain H x W matrix. The channel name is stored in attr(result, "channel"). If the object has more than one channel, use img[, , "DAPI"] to select one first.

Usage

# S3 method for class 'QPTIFFImage'
as.matrix(x, ...)

Arguments

x

A QPTIFFImage with exactly one channel, or a 2-D array (already a matrix-like object), which is returned with as.matrix applied directly.

...

Unused.

Value

A numeric matrix of dimension c(H, W).

Examples

arr <- array(1:12, dim = c(3, 4, 1),
             dimnames = list(NULL, NULL, "DAPI"))
img <- as.QPTIFFImage(arr)
m   <- as.matrix(img)
dim(m)          # 3 x 4
#> [1] 3 4
attr(m, "channel")  # "DAPI"
#> [1] "DAPI"