Ah-ha, NA's are the cells outside my mask. Lines appear to be a GUI issue, went back to 2.13.0 and plot of raster looks fine. D -- View this message in context: http://r-sig-geo.2731867.n2.nabble.com/Long-time-listener-first-time-caller-tp6585078p6585234.html Sent from the R-sig-geo mailing list archive at Nabble.com.