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...is. A web search turned up a confusing and complex array of R prediction models etc. but I am looking for plain vanilla way to retrieve fund values and store the values. Thanks, Bruce -- Bruce W. Miller, Ph.D. Conservation Ecologist Neotropical Bat Projects office details 11384 Alpine Road Stanwood, Mi. 49346 Phone (231) 679-6059

H all, I have relative abundance data from >100 sites. This is from acoustic monitoring and usually the data is for 2-3 nights but in some cases my be longer like months or years for each location.. The data output from my management data base is proved by species by night for each location so data frame would look like this below. What I need to do is sum the Survey_time by Spec_Code for