用值等于零的列对矢量进行子集化

Question

我正在尝试找出我数据的最佳模型。但是，我这样做时会出现以下错误。

list(
  lm(V7 ~ log(V3), hm, subset=(V3>0)), 
  lm(V7~I(1/V3), hm, subset = (V3 >0)),
  lm(V7 ~ log(V3), hm, subset(V3 > 0)),
  nls(V7 ~ I(1/V3*a) + b*V3, hm, subset(V3 > 0), start = list(a = 1, b = 1)), 
  nls(V7 ~ (a + b*log(V3)), hm, subset(V3 > 0), 
    start = setNames(coef(lm(V7 ~ log(V3), hm, subset(V3 > 0))), c("a", "b"))),
  nls(V7 ~ I(exp(1)^(a + b * V3)), hm, subset(V3 > 0), 
    start = list(a=0,b=0)),
  nls(V7 ~ I(1/V3*a)+b, hm, subset(V3 > 0), 
    start = list(a=1,b=1))
)

 Error in subset.default(V3 > 0) : 
 argument "subset" is missing, with no default