Hi list, that's probably an easy question but I couldn't get it right. I want to coerce a SpatialPointsDataFrame to a marked ppp- object. But I don't know how to attach the marks to the ppp-object.
>C67mF_K<-readOGR (".", "C67mF_K") #read shapefile that contains points for >cases and controls with one variable "typ" str (C67mF_K) Formal class 'SpatialPointsDataFrame' [package "sp"] with 5 slots ..@ data :'data.frame': 5968 obs. of 4 variables: .. ..$ ID : num [1:5968] 4336 4106 994 325 3145 ... .. ..$ POINT_X: num [1:5968] 2576860 2574710 2576790 2575400 2575600 ... .. ..$ POINT_Y: num [1:5968] 5706080 5706060 5706230 5706210 5706310 ... .. ..$ typ : Factor w/ 2 levels "F","K": 2 2 2 2 2 2 2 2 2 2 ... ..@ coords.nrs : num(0) ..@ coords : num [1:5968, 1:2] 368483 366335 368420 367030 367234 ... .. ..- attr(*, "dimnames")=List of 2 .. .. ..$ : NULL .. .. ..$ : chr [1:2] "coords.x1" "coords.x2" ..@ bbox : num [1:2, 1:2] 322028 5705358 451515 5808359 .. ..- attr(*, "dimnames")=List of 2 .. .. ..$ : chr [1:2] "coords.x1" "coords.x2" .. .. ..$ : chr [1:2] "min" "max" ..@ proj4string:Formal class 'CRS' [package "sp"] with 1 slots .. .. ..@ projargs: chr " +proj=utm +zone=32 +ellps=GRS80 +units=m +no_defs" ppC67mF_K<-as(C67mF_K, "ppp", marks = typ) I get the error message: unused arguments: (marks = typ) I would grateful for any hint. Dorothea _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo