Hi, I've seen that handle missing values makes difficult to manage data series within R. I've look at Shumway's program (ASTSA) and Brockwell & Davis pogram (ITSM), it seems that both handle NA's values without problem, or maybe, I'm getting an spurious results? My problem is with two variables: rain and river flow: the first has 7 NA values (is to say, seven months, non contiguous) and the later, 12 contiguous NA values (half of one year and half from the other). Do you think that the action of erasing those monthly values would be crucial for the analysis or I just can throw them away (I have monthly data since 1984 onwards). Thanks, Antonio Antonio Rodr?guez Verdugo CICEM Agua del Pino Huelva Oceanography and Coastal Resources, PhD Program, University of Huelva -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._