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lihaihong81q铜虫 (初入文坛)
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[求助]
翻译
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XY graph Plots one or more pairs of columns containing x/y coordinate pairs. The 'log Y' option log-transforms your Y values (if necessary, a constant is added to make the minimum log value equal to 0). The curve can also be smoothed using 3-point moving average. 95% concentration ellipses can be plotted in most scatter plots in PAST, such as scores for PCA, CA, DCA, PCO and NMDS. The calculation of these ellipses assumes bivariate normal distribution. Convex hulls can also be drawn in the scatter plots, in order to show the areas occupied by points of different 'colors'. The convex hull is the smallest convex polygon containing all points. The minimal spanning tree is the set of lines with minimal total length, connecting all points. In the XY graph module, Euclidean lengths in 2D are used. Hold the mouse cursor over a point to see its row label.这是past软件使用说明，求翻译 |
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