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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...