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src1
2010 Dec 19
1
package survey
Hi R users,
could someone help me to find out which formulas, for standard error
calculation, are used in following example:
a=data.frame(weights=rep(c(10,1),c(4,1)),fpc=rep(41,5),uk=rep(1,5))
srs<-svydesign(id=~1, weights=~weights, data=a)
srs1<-svydesign(id=~1, weights=~weights,fpc=~fpc, data=a)
svytotal(~uk,srs)
total SE
uk 41 9
svytotal(~uk,srs1)
total SE
uk 41 8.4334
and does anyone know if it is possible to find the codes for functions in
survey package?
thanks in advance
Andrija
[[alternative HTML version d...
2018 Jun 01
1
rasterize SpatialPolygon object using a RasterBrick object
...eate a SpatialPolygon object using the example from the function
documentation
Sr1 = Polygon(10*cbind(c(2,4,4,1,2),10*c(2,3,5,4,2)))
Sr2 = Polygon(10*cbind(c(5,4,2,5),10*c(2,3,2,2)))
Sr3 = Polygon(10*cbind(c(4,4,5,10,4),c(5,3,2,5,5)))
Sr4 = Polygon(10*cbind(c(5,6,6,5,5),c(4,4,3,3,4)), hole = TRUE)
Srs1 = Polygons(list(Sr1), "s1")
Srs2 = Polygons(list(Sr2), "s2")
Srs3 = Polygons(list(Sr3, Sr4), "s3/4")
SpP = SpatialPolygons(list(Srs1,Srs2,Srs3), 1:3)
plot(b[[1]])
plot(SpP, add = T)
# crop
clip1 = crop(b, extent(SpP))
# rasterize returns an error, but documentation sa...