在输入代码:pol.integ <- pampe(time.pretr=time.pretr, time.tr=time.tr, treated=treated,
+ controls=possible.ctrls, data=new)之后
系统报错:Error in leaps.setup(x, y, wt = weights, nbest = nbest, nvmax = nvmax, :
y and x different lengths
想问一下怎么解决这个问题,我该怎么修改我的数据