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I had this same problem. I created an R package that calculates the distance matrix on the fly, so it takes much less memory to calculate Moran's I. Its also quite fast. You can find it at github.com/mcooper/moranfast.


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The Emerging Hot Spot Analysis tool does not use a Kendal statistic but, rather a space-time variant of the Getis-Ord Gi* to identify space-time clusters. The Kendal Tau is for analysis of temporal correlation and monotonic trend. If you want the Kendal Tau I have both a time-series vector and raster implementation in the spatialEco R package but, remember ...


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