我手上现在有几张DAT文件的数据。。。。是关于几个地方的数据
地方是由表中的  横坐标。。。纵坐标 决定~~最后是 这个地方的数据
我要对每个地方的数据进行选取~~~再对各个地方进行数据的求平均值~~
~~

数据是这样的 ~~           希望大家能给我个程序。。。或者给我指点下~~谢谢~~
RECEPTOR (x,y) km      VALUE
 
     609.191  2431.998     0.0000E+00
     614.191  2431.998     0.0000E+00
     619.191  2431.998     0.0000E+00
     624.191  2431.998     0.0000E+00
     629.191  2431.998     0.0000E+00
     634.191  2431.998     0.0000E+00
     639.191  2431.998     0.0000E+00
     644.191  2431.998     0.0000E+00
     649.191  2431.998     0.0000E+00
     654.191  2431.998     0.0000E+00
     659.191  2431.998     0.0000E+00
     664.191  2431.998     0.0000E+00
     669.191  2431.998     0.0000E+00
     674.191  2431.998     0.0000E+00
     679.191  2431.998     0.0000E+00
     684.191  2431.998     0.0000E+00
     689.191  2431.998     0.0000E+00
     694.191  2431.998     0.0000E+00
     699.191  2431.998     0.0000E+00
     704.191  2431.998     0.0000E+00
     709.191  2431.998     0.0000E+00
     714.191  2431.998     0.0000E+00
     719.191  2431.998     0.0000E+00
     724.191  2431.998     0.0000E+00
     729.191  2431.998     0.0000E+00
     734.191  2431.998     0.0000E+00
     739.191  2431.998     0.0000E+00
     744.191  2431.998     0.0000E+00
     749.191  2431.998     0.0000E+00
     754.191  2431.998     0.0000E+00
     759.191  2431.998     0.0000E+00
     764.191  2431.998     0.0000E+00
     769.191  2431.998     0.0000E+00
     774.191  2431.998     0.0000E+00
     779.191  2431.998     0.0000E+00
     784.191  2431.998     0.0000E+00
     789.191  2431.998     0.0000E+00
     794.191  2431.998     0.0000E+00
     799.191  2431.998     0.0000E+00
     804.191  2431.998     0.0000E+00
     809.191  2431.998     0.0000E+00
     814.191  2431.998     0.0000E+00
     819.191  2431.998     0.0000E+00