Usage
full_spec(X = NULL, flim = c(0, 22), sxrow = 5, rows = 10,
collevels = seq(-40, 0, 1), ovlp = 50, parallel = 1, wl = 512,
gr = FALSE, pal = reverse.gray.colors.2, cex = 1, it = "jpeg",
flist = NULL, redo = TRUE, path = NULL, pb = TRUE,
fast.spec = FALSE)