rownames,Freq,stage,operation,survival,xray
1,10,early,radical,no,no
2,17,early,radical,no,yes
3,41,early,radical,yes,no
4,64,early,radical,yes,yes
5,1,early,limited,no,no
6,3,early,limited,no,yes
7,13,early,limited,yes,no
8,9,early,limited,yes,yes
9,38,advanced,radical,no,no
10,64,advanced,radical,no,yes
11,6,advanced,radical,yes,no
12,11,advanced,radical,yes,yes
13,3,advanced,limited,no,no
14,13,advanced,limited,no,yes
15,1,advanced,limited,yes,no
16,5,advanced,limited,yes,yes