Winbugs Compile时提示made use of undefined node sd该怎么办？

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img]    请问亲们，我把list(nt=10,ns=7,ref=1)和 t[,1] t[,2] t[,3] t[,4] y[,1] y[,2] y[,3] y[,4] sd[,1] sd[,2] sd[,3] sd[,4] n[,1] n[,2] n[,3] n[,4] na[]Load data 后想compile，但是下方显示made use og undefined node Sd，我应该怎么处理？我这个是连续类变量。急！！

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关键词：Undefined winbugs Defined COMPILE WINBUG undefined

This should give an error message (made use of undefined node) if you haven't put a prior distribution on oldvar[1]. WinBUGS expects all nodes to have values if they are used in calculations. If you have put a prior on it, then WinBUGS should generate values from the posterior distribution of oldvar[1], and then the equals() function should operate on those generated values.
http://stackoverflow.com/questions/16597737/winbugs-equals-function-with-na