我想做频率分析干旱的严重程度,但与降水数据这里我有几个零值的一些年。如何做到这一点呢?
这是样本数据:
1981 -1.34836065669339 1982 -1.35038460644290 1983 0 1984 -3.90332570519887 1985 -1.43196467810065 1986 0 1987 -7.61244713754898 1988 -1.02963066829013 1989 -2.87025610581835 1990 0 1991 -1.66903948845324 1992 -1.09433029589075 1993 -2.66739065155971 1994 -3.01088239849460 1995 0 1996 1997 -14.0056988537627 1998 0 1999 -9.85363948490749 2000 -1.36158063667645 2001 -5.34791858336523 2002 -3.11969637720832 2003 0 2004 -3.62559721791381 2005 -2.08214497384456 2006 -4.80944910848512 2007 -1.42804069956900 2008 -5.37009474560193 2009 -13.0916410702083 2010 -2.36624662191914