求取标准降水指数SPI，直接作为Excel的宏，方便快捷-Strike Standardized Precipitation Index SPI, directly as Excel macros, convenient

求算标准化降水指数SPI值的MATLAB程序，用于求算综合气象干旱指数CI值(Calculate the standardized precipitation index SPI value program)

计算SPI标准化降雨指数，按月为单位，最少30年数据(Calculate SPI standardized rainfall index, monthly, minimum 30 years data)

MATLAB绘制干旱指数面积图，标准化降水指数（Standardized Precipitation Index，简称SPI）采用加利福尼亚大学欧文分校的code计算。(Drawing drought index area map with MATLAB. The standardized precipitation index (SPI) is calculated using the code of the University of California, Irvine.)