我正在分析性别，Cap.Year，Cap.Location和Spawning的影响。季节对湖泊鳟鱼访问的产卵场数量（Sites.Visited）。我正在尝试将随机效应变量（“Transmitter”，即单个鱼ID）添加到线性混合效果模型中。请参阅下面的数据样本。
> head(Conc, 10)
Transmitter Sex Sites.Visited Cap.Year Cap.Location Season.Length Spawning.Season
1 A69-1601-26770 M 2 2013 Grand Isle P 2013
2 A69-1601-26771 F 1 2013 Grand Isle P 2013
3 A69-1601-26773 F 2 2013 Grand Isle P 2013
4 A69-1601-26774 M 2 2013 Grand Isle P 2013
5 A69-1601-26776 F 4 2013 Grand Isle P 2013
6 A69-1601-26778 M 2 2013 Grand Isle P 2013
7 A69-1601-26784 M 1 2013 Grand Isle P 2013
8 A69-1601-26785 F 2 2013 Grand Isle P 2013
9 A69-1601-26786 F 2 2013 Grand Isle P 2013
10 A69-1601-26787 M 2 2013 Grand Isle P 2013
这是我的模型（没有随机效应变量）：
modelDDF<-glm2(Sites.Visited~ factor(Sex)+factor(Cap.Year)+factor(Spawning.Season)+factor(Cap.Location),
family = gaussian, Conc, weights=NULL, subset=NULL, na.action=NULL, start = NULL,
offset=NULL, model = TRUE, method = "glm.fit2", x = FALSE, y = TRUE, contrasts = NULL,)
我想添加的随机效果变量是“Transmitter”。根据我读过的所有内容，这应该有效：
modelDDF<-glm2(Sites.Visited~ factor(Sex)+factor(Cap.Year)+factor(Spawning.Season)+factor(Cap.Location)+(1|Transmitter),
family = gaussian, Conc, weights=NULL, subset=NULL, na.action=NULL, start = NULL,
offset=NULL, model = TRUE, method = "glm.fit2", x = FALSE, y = TRUE, contrasts = NULL,)
但相反，我得到了这个错误：
Error in 1 | Transmitter :
operations are possible only for numeric, logical or complex types
>
请帮忙!!!谢谢！