Hello,
I am not sure if this is the right forum to ask as this is mostly a
sparse matrix question, nevertheless here it is.
I am using R - 2.10.1 and spdep 0.4-54 on Windows Vista
I have a large shapefile for which I need to create a neighborhood
matrix file, I used the following command to create a neighborhood
matrix
shp_file <- readShapePoly(file.choose())
grid_nb_mat <- as.spam.listw(nb2listw(poly2nb(shp_file,
row.names=shp_file$CELL_ID)))
Now I would like to subset this matrix based on a subset of the
shapefile and I have a vector of CELL_IDs. However, I cannot figure
out a way to assign row and column names to grid_nb_mat, so that I can
subset this matrix. Could someone point me in the right direction? If
it is were a simple matrix row.names and colnames would work.
regards
Nikhil
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