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| RE: about TransitionMap [ Reply ] By: Jacob van Etten on 2010-10-05 14:47 | [forum:3445] |
| It sums the columns. I will correct the documentation. | |
| about TransitionMap [ Reply ] By: Facundo Muñoz on 2010-10-05 09:33 | [forum:3436] |
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Hi. I don't manage to understand what TransitionMap does. The help file says that it "converts the Transition object into a RasterLayer with the mean of the non-zero values of the transition matrix as raster values", but from this example: r <- raster(nrows = 3, ncols = 3, xmn=-1, xmx=1, ymn=-1, ymx=1) r <- setValues(r, c(1,0,1,2,2,1,0,1,2)) tr1 <- TransitionFromRaster(r, transitionFunction = mean, directions = 4) it follows that the transition matrix TransitionMatrix(tr1) has values between 0.5 and 2, while TransitionMap(tr1) has values up to 6, so it is hardly a mean of values from the transition matrix. |
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