4_gop: R-script for computing goodness of prediction

Goodness of Prediction is computed for all models based on random and spatial cross-validation. The gop of the consensus model is also computed. The script outputs the predictions of the best (lowest RMSE) models and latex tables.

将针对所有模型，基于随机交叉验证与空间交叉验证计算预测优度（Goodness of Prediction）。同时亦将计算共识模型（consensus model）的预测优度。本脚本将输出表现最优（即均方根误差（Root Mean Square Error，RMSE）最低）的模型的预测结果，以及LaTeX表格。