This seems to work, at least until the polygonal owin object is created...
here<-convexhull.xy(vertices(dilate.owin(convexhull.xy(mydata),0.2)))

However the conversion to a Spatial Polygons object does not seem to work
(using spatstat 1.15-3 and maptools 0.7-22):
> as(here, "SpatialPolygons")
*Error in as(here, "SpatialPolygons") :
  no method or default for coercing "owin" to "SpatialPolygons"*

Tyler

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