[英]3 way anova nested in r
I'm trying to figure out the model for a fully factorial experiment. 我正在尝试为完全析因实验找出模型。
I have the following factors 我有以下因素
Treatment Day Hour Subject ResponseVariable
10 days of measurements, 4 different time points within each day, 2 different treatments measured, 12 subjects )6 subjects within treatment 1, and 6 different subjects in treatment 2) 10天的测量,每天4个不同的时间点,测量的2种不同的治疗,12位受试者)治疗1中的6位受试者和治疗2中的6位不同受试者)
for each day I measured: 6 subjects in treatment 1, the other 6 in treatment 2, at 4 different time points. 我测量的每一天:治疗1中的6名受试者,治疗2中的其他6名受试者,分别在4个不同的时间点。
For Subjects, I have 12 different subjects, but Subjects 1-6 are in Treatment-1 and Subjects 7-12 are in Treatment-2. 对于受试者,我有12个不同的受试者,但是受试者1-6在治疗1中,而受试者7-12在治疗2中。 The subjects did not change treatments, thus I measured the same set of subjects for each treatment each of the 10 days
受试者没有改变治疗方法,因此我在10天中的每一天都对同一组受试者进行了测量
So what's tripping me up is specifying the correct error term. 因此,令我震惊的是指定正确的错误项。
I thought I had the general model down but R is giving me "Error() model is singular"
我以为我的通用模型不好了,但是R给我
"Error() model is singular"
aov(ResponseVariable ~ T + R + S + TR + TS + RS + Error(T/S)
any thoughts would help? 有什么想法会有所帮助吗?
I've gotten the same error, and I think my problem was missing observations. 我遇到了同样的错误,我认为我的问题是缺少观察结果。 Are you missing any observations?
您是否缺少任何观察? I believe they're less of a problem for linear mixed effects, and I've read that some people use lme instead of repeated-measures ANOVA for those cases.
我相信它们对于线性混合效果的影响较小,而且我读到有些人在这种情况下使用lme而不是重复测量方差分析。
Your error term can be interpreted as "the S effect within each T". 您的错误术语可以解释为“每个T内的S效应”。 It sounds from your description as though that's what you want, so I don't think that's what's causing your error message.
从您的描述中听起来好像是您想要的,所以我认为这不是导致您出现错误消息的原因。
One note: I see you've got a variable named "T". 注意:我看到您有一个名为“ T”的变量。 R let you do that?
R让你这样做吗? T is normally reserved for meaning "TRUE".
T通常保留用于表示“ TRUE”。 That might be part of your problem.
那可能是您问题的一部分。
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