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趋势面分析的计算工作量是很大的,在缺乏电子计算机的条件下是不易推广使用的。因而必须寻求一种近似的简化计算法。有人曾提出图解法趋势面分析,即将所研究区域划分为若干分区(一般为正方形),在每一分区内求出所有观测值的平均值,就以这个平均值作为该分区中心点处的趋势值,再根据这些趋势值,用人工勾出趋势面等值线图。但由于人工勾画总不免存在主观片面性,因而又有人提出在图解法趋势面分析的基础上作一改
Trend surface analysis of the computational workload is great, in the absence of electronic computer is not easy to promote the use of. Therefore, we must seek an approximate simplified method. It has been proposed graphic method trend surface analysis, the study area is divided into a number of subdivisions (usually square), in each subdivision find the average of all observations, the average as the center of the partition at the trend Value, and then based on these trend values, with manual tick trend contour map. However, due to the artificial outline can not help but there is subjective one-sidedness, it was suggested in graphic analysis of trend surface analysis based on a change