So your object does not conform at all to the structure owin() seems to need, although there are ways of doing this - contributions welcome (owin.polylist() for example).
Here's how to convert a list of 2-column matrices to a list of lists of x and y element vectors and feed it to owin:
owin.polylist = function(list2vecs){
owin(poly=lapply(list2vecs,function(xy){list(x=xy[,1],y=xy[,2])}))
}But there will still be problems if the polygon directions aren't what spatstat expects.
Baz
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