Dredge的奇怪错误: MuMIn

Question

我想知道是否有人能帮我解决这个错误，从一个任务的疏浚包：

   Fixed term is "(Intercept)"
 |============================================================================                                                          
 63%
Error in while ((iComb <- iComb + 1L) < ncomb) { : 
missing value where TRUE/FALSE needed
In addition: Warning message:
In iComb + 1L : NAs produced by integer overflow

Timing stopped at: 90799.82 18.545 90796.9 
> 

我发现这可能与我的真/假子集矩阵有关，但我已经进行了双重检查，以确保该矩阵包含调用getAllTerms函数返回的所有项。

下面是我叫dredre的方式

#exclude only pairs of variables having cor. coefficient r > 0.2
smat <- abs(cor(predictors)) <= .2
smat[!lower.tri(smat)] <- NA

#set global model
forml<-glm(SEVERITY_CODE ~(autocorr+CummDHM_retro + CummDHM_sat +     DHM_retro_cnt + DHM_sat_cnt + diff_events_all + diff_events_periodmax + duration_events_neg + duration_events_pos + events_neg_all + events_neg_periodmax + events_pos_all + events_pos_periodmax + maxpower_events_neg + maxpower_events_neg_norm + maxpower_events_pos + maxpower_events_pos_norm + maxpower_neg + maxpower_neg_norm + maxpower_pos + maxpower_pos_norm + NSE + pct_coi_periodmax + pct_ispos_signif + pct_seasonal + pct_signif_periodmax + period_events_neg + period_events_pos + period_max + var_seasonal + varSST ), family=binomial(link=logit),  data=all.data)

options(na.action = "na.fail") 

system.time(modelmix <- dredge(forml, subset = smat, trace=2, evaluate=FALSE,     extra = c("R^2", F = function(x)
summary(x)$fstatistic[[1]]) ))

Answer 1

我不认为“固定术语是”(拦截)“实际上是一个错误信息。你只需要耐心，因为挖泥船贯穿所有的模型组合。当我使用挖泥船时，我收到了同样的消息，但它似乎仍然有效。