这是经验正交分解和旋转正交分解的小知识，小程序。-try it

EOF是经验正交函数，把气象场分解成时间场和空间场进行分析，从而分析气象变量的变化特征及其分布情况-EOF is empirical orthogonal functions, the meteorological field down into time and space field analysis to analyze variation of meteorological variables and their distribution