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domaine
2012 Sep 13
6
[newbie] aggregating table() results and simplifying code with loop
...osed of 23k rows, each one
representing a point in the space of which we know the land cover over
10 years (column y01 to y10).
I need to analyse it with a temporal sliding window of 5 years (y01 to
y05, y02 to y06 and so forth)
For each period I'm looking for specific sequences (e.g., Maize,
-noMaize, -noMaize, -noMaize, -noMaize) to calculate the "return time"
of principal land covers: barley (2BC), colza (2Co), maize (2Ma), etc.
I define the "return time" as the presence of a given land cover
according to a given sequence. Hence, each return time could require
the sum of d...