Description Usage Arguments Value See Also Examples
View source: R/measure.operators.R
Count the number of objects in a raster
1 |
obj |
[ |
scale |
[ |
layer |
[ |
For scale = "class"
the number of unique values (classes) in
the raster. For scale = "patch"
the number of objects per distinc
value (i.e. the number of patches per class).
Other generic metrics: mAdjacency
,
mArea
, mPerimeter
,
mValues
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | cat <- rtRasters$categorical
bin <- rBinarise(rtRasters$continuous, thresh = 40)
# the number ...
# ... per landcover type
mNumber(obj = cat, scale = "class")
# ... of patches per landcover type
mNumber(obj = cat, scale = "patch")
# ... of certain values; from a binary raster, patches are
# automatically determined
require(magrittr)
rBinarise(obj = cat, match = c(41, 44, 47)) %>%
mNumber(scale = "patch", layer = "values_binarised")
mNumber(obj = bin, scale = "class")
|
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