经验正交函数，非常适合气象人士使用，针对站点数据，此程序为对站点降水资料做EOF-Empirical orthogonal functions, very suitable for meteorological use, site data, this program is on the site precipitation data do EOF

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