我该如何在R中转换数据集?
数据现在具有以下格式:
cityname unit 2005 2006 2007
Alabama pop - - -
Alabama inc - - -
Alabama pop/inc- - -
Alaska pop - - -
Alaska inc - - -
Alaska pop/inc - - -
California pop - - -
California inc - - -
California pop/inc - - -
我想要这个:
cityname pop inc pop/inc year
Alabama - - - 2005
Alaska - - - 2005
California - - - 2005
Alabama - - - 2006
Alaska - - - 2006
California - - - 2006
Alabama - - - 2007
Alaska - - - 2007
California - - - 2007
我尝试过这样做,但是顺序却不正确
IncPopdata <- t(MAINC1_ALL_AREAS_1969_2017)