气象领域中SPEI指数的计算，用于评估土壤干旱情况。
资源文件列表
spei_source/readme.txt , 499
__MACOSX/spei_source/._readme.txt , 173
spei_source/auxiliary.c , 1217
spei_source/lmoments.c , 2435
spei_source/pdfs.c , 4821
spei_source/spei.c , 5634
__MACOSX/spei_source/._spei.c , 171
spei_source/thornthwaite.c , 2276
__MACOSX/spei_source/._thornthwaite.c , 171