r - Converting numeric values of Longitude and Latitude to Spatial Data -

i have data frame europeancities of latitude , longitude

latitude longitude 52.00529    4.173965 51.87938    6.268500 43.36661    -8.406812 

currently these values of numeric class need set them spatial coordinates spatial data

how go converting class of these values using spfunction?

just use spatialpoints sp package..

    mydf <- structure(list(latitude = c(52.00529, 51.87938, 43.36661), longitude = c(4.173965,  6.2685, -8.406812)), .names = c("latitude", "longitude"), class = "data.frame", row.names = c(na,  -3l))     library(sp)     spatialpoints(mydf)     # spatialpoints:     #      latitude longitude     # [1,] 52.00529  4.173965     # [2,] 51.87938  6.268500     # [3,] 43.36661 -8.406812     # coordinate reference system (crs) arguments: na  

(you can supply own proj string , on; see ?spatialpoints).