RT ACC experiment Type subject 1921 0 For-Time---1000 H 1 0 0 For-Time---1000 L 1 1515 1 For-Time---1000 H 1 2732 0 For-Time---1000 H 1 1400 1 For-Time---1000 H 1 1380 1 For-Time---1000 M1 2
1675 0 For-Time---1000 H 2 1274 0 For-Time---1000 M2 2
1237 1 For-Time---1000 L 2 1054 0 For-Time---1000 M1 2
985 1 For-Time---1000 L 3 851 1 For-Time---1000 H 3 1114 1 For-Time---1000 M2 3 1355 1 For-Time---1000 M2 3 1226 1 For-Time---1000 M1 3 例如我想从上边这些数据中得知subject中有几类数据(1,2,3.....)各自类别中有几个数据(如subject=1的有5个,=2的有5个诸如此类),该用怎么样的语句加以实现,谢谢各位帮助!
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