Error message ANOVA

[Birdcognition]

Hi everybody,

I'm relatively new to R and I have to calculate a 3-way ANOVA (repeated measures).
No matter what I do, I keep getting this error message:

"Warning: You have removed one or more levels from variable "Instructions". Refactoring for ANOVA.
Warning: You have removed one or more levels from variable "Legs". Refactoring for ANOVA.
Warning: You have removed one or more levels from variable "Hands". Refactoring for ANOVA.
Warning: Collapsing data to cell means. IF the requested effects are a subset of the full design, you must use the "within_full" argument, else results may be inaccurate.
Error in ezANOVA_main(data = data, dv = dv, wid = wid, within = within, :
One or more cells returned NA when aggregated to a mean. Check your data."

My assumption is that it has something to do with the length of the data set? I tested 15 people, and only 9 of them have the same amount of trials (since some ended the experiment prematurely).

Is there anything I can do, or do I have to use a different function?

All help is appreciated!

[andresrcs]

Hi!

To help us help you, could you please prepare a reproducible example (reprex) illustrating your issue? Please have a look at this guide, to see how to create one:

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…