Based on Q-type cluster analysis of 18 water samples of karst-water system in Pingtou hydropower station, the paper draws hierarchical clustergraph.
该文以坪头水电站为例，对厂址区的18个水样进行Q型聚类分析，绘制出聚类分析谱系图。
2
All the land tortoise species formed a tight cluster of points in the upper part of the triangle; all the water turtles cluster in the lower part of the triangular graph.
所有陆龟品种都在三角形的上部形成一个紧密的点群；所有的水龟都聚集在三角图的下方。
3
Sure enough, these amphibious species show up on the triangular graph approximately half way between the "wet cluster" of sea turtles and the "dry cluster" of land tortoises.