IDW距离反比加权方法，包括面积、周长、矩形度、伸长度，可以广泛的应用于数据预测及数据分析,从先验概率中采样，计算权重，一种流形学习算法（很好用）。- IDW inverse distance weighting method, Including the area, perimeter, rectangular, elongation, Can be widely used in data analysis and forecast data, Sampling　a priori probability, calculate the weight, A fluid manifold learning algorithm (good use).