[R] Plotting a raster image

Hello, I have a data frame which looks like > head(d) a1 a2n j col 1 1 1 88341002 11 #E7E7E7 2 1 2 25094882 11 #E7E7E7 3 1 3 16916246 11 #E7E7E7 4 1 4 14289229 11 #E7E7E7 5 1 5 11945929 11 #E7E7E7 6 1 6 8401235 11 #E7E7E7 The values in 'j' run from 1 to 11. I would li

[R] Error in .Call("X" ... X not in DLLS for package G

Hello, I'm calling function X as .Call("X",a,b,PACKAGE="G") the function X has been registered as R_CallMethodDef callMethods [] = { {"X",(DL_FUNC) myfun,2}, {NULL, NULL, 0} }; ... R_registerRoutines(info, NULL, callMethods, NULL, NULL); yet, I (sometimes, not all the time) get this error: