Dear All, I had a couple of questions regarding the calculation and use of Moran's I. Firstly, does anyone know of free software or routines that will calculate Moran's I (for user defined lags) and provide a significance value for the calculated statistic? I have played with Crimestat (thank you Dr Levine) and GS+ but neither of these programs does both of the above, or atleast not in my explorations of the routines - please correct me if I am wrong. If there is not freeware available what alternatives would you recommend? Secondly, does anyone have comment on using such a statistic on a small (49 point) data set. The data values are arranged in a 7x7 grid and are point measures of a continuous field. I am using the statistic to determine the spatial extent of autocorrelation as a first attempt to determine the spatial organisation of the distributions. I am however rather new to this field and so not fully versed in the limitations or potential pitfalls of such statistics. Moran's I was not recommended to me in an original query I posted regard this spatial statistics for small data sets. I am wondering if there are reasons why. Thank you again for you help. Raechel Waters ````````````````````````````````````````````````````` Marine Biology School of Biology Flinders University GPO Box 2100 Adelaide SA 5001 Phone: 08 8201 5234 Fax: 08 8201 3015 Mobile: 0401 304 106 -- * To post a message to the list, send it to [EMAIL PROTECTED] * As a general service to the users, please remember to post a summary of any useful responses to your questions. * To unsubscribe, send an email to [EMAIL PROTECTED] with no subject and "unsubscribe ai-geostats" followed by "end" on the next line in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list * Support to the list is provided at http://www.ai-geostats.org
