本程序用于计算和输出地理数据的各种数字特征，包括平均数，中位数，极差，方差，均方差，变异系数，偏度，峰度等，从而可绘制它的频率直方图，累积频率图 -This procedure for calculation and output of a variety of digital geographic data characteristics, including mean, median, range, variance, mean square error, coefficient of