split: Split a hyperSpec object according to groups 'split' divides...
In hyperSpec: Work with Hyperspectral Data, i.e. Spectra + Meta Information (Spatial, Time, Concentration, ...)

Description Usage Arguments Value Author(s) See Also Examples

The hyperSpec objects in the list may be bound together again by bind ("r", list_of_hyperSpec_objects).

1 2	## S4 method for signature 'hyperSpec' split(x, f, drop = TRUE)

`x`	the `hyperSpec` object
`f`	a factor giving the grouping (or a variable that can be converted into a factor by `as.factor`)
`drop`	if `TRUE`, levels of`f` that do not occur are dropped.

A list of hyperSpec objects.

C. Beleites

split

dist <- pearson.dist (chondro[[]])
dend <- hclust (dist, method = "ward")
z <- cutree (dend, h = 0.15)

clusters <- split (chondro, z)
length (clusters)

# difference in cluster mean spectra
plot (apply (clusters[[2]], 2, mean) - apply (clusters[[1]], 2, mean))