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设这列数据的变量是x
sort x
by x: gen n=_n
keep if n==1
drop n
共有16个不同的值:
1.940e+086.650e+081.230e+091.760e+092.460e+093.440e+094.080e+095.310e+098.100e+099.790e+091.170e+101.830e+102.760e+103.070e+103.490e+103.640e+10