If one truly measures zero, what would be the expected response? A constant? I can see how that may pose a problem, but what is the question imposed on the data? This is a good question. I did not consider measuring zero. Give me a few days to revisit and have a response. - Jeff
It certainly has potential. But whether it can or not reallyh depends on what you're trying to do. As you can imagine statistics is all about semantics. Seasonality can have different meanings. My code will perform a trend analysis on a time series. how you set up your data for seasons is dependant on what question you're trying to answer. I also wrote a Kendall seasonal program, but again you need to be very clear on what you want a season to mean. I would read the comments in the files to get a better understanding.
Thanks Cris. I've never even heard of conv before. Going online at mathworks, it's not redialy apparant what toolbox that function is in...maybe Signal Processing? I can find the function documentation but I can't tell what toolbox it's in. Thus, while I would like to use your solution, it's not available to me. I only have Statistical Toolbox and conv is not in that toolbox. At least I still have some utility to people with conv! Thanks for the input. I'm sure these dialogues are very helpful for all interested.