在使用R时遇到的问题:
plot(res2, plottype = "obsfit")
Error in $<-.data.frame(*tmp*, "z", value = c(-4.52891504208695, -6.8351992962555, :
替换数据里有3822行，但数据有0
In addition: Warning message:
In .obsfit.level.plot(x = x, rows = rows, columns = columns, byage = byage, :
NAs introduced by coercion