三维地表图

Stata Technical Bulletin Pub Date : 2000-01-01 DOI:10.4135/9781529772678

A. Mander

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引用次数: 3

摘要

了解这些地块是如何构建的是很重要的。构建了X和Z的二维网格。这个网格的范围等于数据的范围。接下来，计算每个网格点的Y值。这个Y值是“接近”这个网格点的所有数据值的加权平均值。(平均点数由用户指定。)三维曲面是用这些平均值构造的。因此，地表图没有显示每个网格点的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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3D Surface Plots

It is important to understand how these plots are constructed. A two-dimensional grid of X and Z is constructed. The range of this grid is equal to the range of the data. Next, a Y value is calculated for each grid point. This Y value is a weighted average of all data values that are “near” this grid point. (The number of points averaged is specified by the user.) The three-dimensional surface is constructed using these averaged values. Hence, the surface plot does not show the variation at each grid point.

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