统计学_新建 文本文档.txt
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1、Canonical Correspondence Analysis(CCA; ter Braak, 1986,1987) is amultivariate direct gradient analysis method that has become widelyused in ecology. As the name suggests, this method is derived fromcorrespondence analysis, but has been modified to allow environmentaldata to be incorporated into the
2、analysis. It is calculated usingreciprocal averaging form of correspondence analysis. However, at eachcycle of the averaging process, a multiple regression is performed ofthe sample scores on the environmental variables. New site scores arecalculated based on this regression, and then the process is
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