i set an example in http://www.mail-archive.com/r-help at stat.math.ethz.ch/msg76159.html but an error occur Error in .jcall(?my_convolve?, ?[D?, ?convolve?, x, y) : RcallMethod: cannot determine object class because the directory of classpath? how solve it? -- View this message in context: http://r.789695.n4.nabble.com/how-use-rjava-tp4419952p4419952.html Sent from the R help mailing list archive at Nabble.com.