Tenta usar o %in% para reduzir os ifelse() (Não sei se é o caso, mas a função SE() do excel tem limite encadeiamentos, pode ser o caso aqui também)... Ex:

Todos esses ifelse()'s:

ifelse((origin=="am") & (destination=="ro"),1,ifelse((origin=="am") & (destination=="rr"),1,ifelse((origin=="am") & (destination=="pa"),1,ifelse((origin=="am") & (destination=="mt"),1

Podem ser substituido por:

ifelse(origin=="am" & destination %in% c("ro", "rr", "pa", "mt"),1, ifelse(...))

E ainda assim acho que não é o mais adequado... Dependendo de como estão os teus dados, eu usaria um merge() para resolver o problema

[]'s

2014-04-25 20:17 GMT-03:00 Alexandre Loures <alexandre.loures@ymail.com>:

Boa noite!


Estou usando a rotina abaixo para construir uma dummy para as fronteiras dos estados brasileiros. Porém, quando tendo rodar o R reporta o seguinte erro:

Erro: estouro da pilha de contexto na linha 18


O que devo fazer?


mydata$contiguity<-ifelse((origin=="ac") & (destination=="am"),1,
ifelse((origin=="am") & (destination=="ro"),1,ifelse((origin=="am") & (destination=="rr"),1,ifelse((origin=="am") & (destination=="pa"),1,ifelse((origin=="am") & (destination=="mt"),1,
ifelse((origin=="ro") & (destination=="mt"),1,ifelse((origin=="ro") & (destination=="am"),1,
ifelse((origin=="rr") & (destination=="am"),1,ifelse((origin=="rr") & (destination=="pa"),1,
ifelse((origin=="pa") & (destination=="mt"),1,ifelse((origin=="pa") & (destination=="am"),1,ifelse((origin=="pa") & (destination=="am"),1,ifelse((origin=="pa") & (destination=="rr"),1,
ifelse((origin=="pa") & (destination=="ap"),1,ifelse((origin=="pa") & (destination=="ma"),1,ifelse((origin=="pa") & (destination=="to"),1,ifelse((origin=="pa") & (destination=="mt"),1,
ifelse((origin=="ap") & (destination=="pa"),1,
ifelse((origin=="ma") & (destination=="pa"),1,ifelse((origin=="ma") & (destination=="to"),1,ifelse((origin=="ma") & (destination=="pi"),1,
ifelse((origin=="pi") & (destination=="ma"),1,ifelse((origin=="pi") & (destination=="to"),1,ifelse((origin=="pi") & (destination=="pe"),1,ifelse((origin=="pi") & (destination=="ce"),1,
ifelse((origin=="ce") & (destination=="pi"),1,ifelse((origin=="ce") & (destination=="pe"),1,ifelse((origin=="ce") & (destination=="pb"),1,ifelse((origin=="ce") & (destination=="rn"),1,
ifelse((origin=="rn") & (destination=="ce"),1,ifelse((origin=="rn") & (destination=="pb"),1,
ifelse((origin=="pb") & (destination=="rn"),1,ifelse((origin=="pb") & (destination=="ce"),1,ifelse((origin=="pb") & (destination=="pe"),1,
ifelse((origin=="pe") & (destination=="pb"),1,ifelse((origin=="pe") & (destination=="ce"),1,ifelse((origin=="pe") & (destination=="pi"),1,ifelse((origin=="pe") & (destination=="ba"),1,
ifelse((origin=="pe") & (destination=="al"),1,
ifelse((origin=="al") & (destination=="pe"),1,ifelse((origin=="al") & (destination=="ba"),1,ifelse((origin=="al") & (destination=="se"),1,
ifelse((origin=="se") & (destination=="al"),1,ifelse((origin=="se") & (destination=="ba"),1,
ifelse((origin=="ba") & (destination=="se"),1,ifelse((origin=="ba") & (destination=="al"),1,ifelse((origin=="ba") & (destination=="pe"),1,ifelse((origin=="ba") & (destination=="pi"),1,
ifelse((origin=="ba") & (destination=="to"),1,ifelse((origin=="ba") & (destination=="go"),1,ifelse((origin=="ba") & (destination=="mg"),1,ifelse((origin=="ba") & (destination=="es"),1,
ifelse((origin=="to") & (destination=="pa"),1,ifelse((origin=="to") & (destination=="mt"),1,ifelse((origin=="to") & (destination=="go"),1,ifelse((origin=="to") & (destination=="ba"),1,
ifelse((origin=="to") & (destination=="pi"),1,ifelse((origin=="to") & (destination=="ma"),1,
ifelse((origin=="mt") & (destination=="ro"),1,ifelse((origin=="mt") & (destination=="am"),1,ifelse((origin=="mt") & (destination=="pa"),1,ifelse((origin=="mt") & (destination=="to"),1,
ifelse((origin=="mt") & (destination=="go"),1,ifelse((origin=="mt") & (destination=="ms"),1,
ifelse((origin=="ms") & (destination=="mt"),1,ifelse((origin=="ms") & (destination=="go"),1,ifelse((origin=="ms") & (destination=="mg"),1,ifelse((origin=="ms") & (destination=="sp"),1,
ifelse((origin=="ms") & (destination=="pr"),1,
ifelse((origin=="go") & (destination=="mg"),1,ifelse((origin=="go") & (destination=="ba"),1,ifelse((origin=="go") & (destination=="to"),1,ifelse((origin=="go") & (destination=="mt"),1,
ifelse((origin=="go") & (destination=="ms"),1,ifelse((origin=="go") & (destination=="df"),1,
ifelse((origin=="mg") & (destination=="sp"),1,ifelse((origin=="mg") & (destination=="rj"),1,ifelse((origin=="mg") & (destination=="es"),1,ifelse((origin=="mg") & (destination=="ba"),1,
ifelse((origin=="mg") & (destination=="go"),1,ifelse((origin=="mg") & (destination=="ms"),1,
ifelse((origin=="sp") & (destination=="rj"),1,ifelse((origin=="sp") & (destination=="mg"),1,ifelse((origin=="sp") & (destination=="ms"),1,ifelse((origin=="sp") & (destination=="pr"),1,
ifelse((origin=="rj") & (destination=="mg"),1,ifelse((origin=="rj") & (destination=="mg"),1,ifelse((origin=="rj") & (destination=="es"),1,
ifelse((origin=="es") & (destination=="ba"),1,ifelse((origin=="es") & (destination=="mg"),1,ifelse((origin=="es") & (destination=="rj"),1,
ifelse((origin=="pr") & (destination=="sp"),1,ifelse((origin=="pr") & (destintaion=="sc"),1,ifelse((origin=="pr") & (destination=="ms"),1,
ifelse((origin=="sc") & (destination=="pr"),1,ifelse((origin=="sc") & (destination=="rs"),1,
ifelse((origin=="rs") & (destination=="sc"),1,
ifelse((origin=="df") & (destination=="go"),1,0))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))

--
Alexandre Rodrigues Loures

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