I am new to R and am trying to run data through using the Kendall package. My first question is that I have NA values for certain criterias, will that be a problem or will they be ignored? ie: Fall Spring Summer 1988 NA 1.321 1.564 1999 1.333 1.452 NA When I try to run the test, I get this error: "error: input must be ts object" Thanks, Kou -- View this message in context: http://www.nabble.com/Error-when-running-Kendall-Package-tp21507235p21507235.html Sent from the R help mailing list archive at Nabble.com.