lmer 中使用的 B 样条中出现错误“derivs 大于 x 的长度”

Question

我用Rstudio。根据https://stats.stackexchange.com/questions/135694/using-b-splines-within-a-linear-mixed-effects-model-in-r我想将所谓的 b-splines 添加到我的型号：

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degree<- 3\nfit<- lmer(log(log(Amplification)) ~ bs(poly(Voltage, degree)) + bs(poly(Voltage, degree) | Serial_number),data = APD))\n

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但这会导致

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Error in splineDesign(Aknots, x, ord) : \n  length of \'derivs\' is larger than length of \'x\'\nIn addition: Warning messages:\n1: In Ops.factor(poly(Voltage, 3), Serial_number) :\n  \xe2\x80\x98+\xe2\x80\x99 not meaningful for factors\n2: In min(x, na.rm = na.rm) :\n  no non-missing arguments to min; returning Inf\n3: In max(x, na.rm = na.rm) :\n  no non-missing arguments to max; returning -Inf\n

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这意味着什么？当我使用

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summary(fit<- lmer(log(log(Amplification)) ~ (poly(bs(Voltage), degree)) + (poly(Voltage, degree) | Serial_number), data = APD))\n

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那么这会导致

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Error in poly(dots[[i]], degree, raw = raw, simple = raw) : \n  \'degree\' must be less than number of unique points\n

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degree=0收益率下降

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Error in poly(dots[[1L]], degree, raw = raw, simple = raw && nd > 1) : \n  \'degree\' must be at least 1\n

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如何将 b 样条线添加到 lmer 中？\n提前谢谢您！

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