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[英]Does my data fit a nested ANOVA/linear mixed effects model, and how should the formula be written?
[英]"Invalid formula for groups" when trying to fit a mixed effects model
我正在嘗試擬合混合效應模型。 我首先創建一個分組數據對象:
> HC <- groupedData(bid_price ~ factor(Bedroom.s.) | zip_cbsa_name,
+ data = HC)
> head(HC)
Grouped Data: bid_price ~ factor(Bedroom.s.) | zip_cbsa_name
Bedroom.s. zip_cbsa_name bid_price
116 3 Chicago-Naperville-Joliet, IL-IN-WI 4.828314
139 3 Miami-Fort Lauderdale-Pompano Beach, FL 4.382027
144 5 Dallas-Fort Worth-Arlington, TX 5.164786
234 2 Los Angeles-Long Beach-Santa Ana, CA 4.369448
275 4 Houston-Sugar Land-Baytown, TX 5.220356
301 4 Chicago-Naperville-Joliet, IL-IN-WI 4.867534
然后我適合對象:
> HC_fm1 <- lme(log_bid_price ~ as.numeric(Bedroom.s.), data = HC)
Error in getGroups.data.frame(dataMix, groups) :
invalid formula for groups
我試過改變包含“卧室”的方式,但這似乎不是問題。
嘗試:
HC_fm1 <- lme(log(bid_price) ~ as.numeric(Bedroom.s.), data = HC)
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