我对这个年龄制作频数表:
gen f=int((age-21)/11)*11+21
tab f
给出结果: f | Freq. Percent Cum.
------------+-----------------------------------
21 | 1 7.69 7.69
32 | 1 7.69 15.38
43 | 6 46.15 61.54
54 | 1 7.69 69.23
65 | 3 23.08 92.31
76 | 1 7.69 100.00
------------+-----------------------------------
Total | 13 100.00
但制作频数图命令: graph age,bin(5) xlab ylab freq 后红字提示:agegraph_g.new ,bin(5) xlab ylab freq: class member function not found
r(4023);
我该如何破解?求解!