Hi
 
I'd really like to get a bar plot showing the means of my anova data. I have looked everywhere and can only seem to find instructions for 2 way anova's.
 
I basically want to look at the mean condition of my subjects spilt by age, sex and year (as a factor rather than a continuous variable, hence Anova and not Ancova). and want to show it firstly as a bar graph with standard error. I have tried using the following from Mick Crawleys R book: 

barplot(tapply(x,list(y,z),mean),

beside=T,ylim=c(0,30),col=rainbow(3))

However im not sure its correct for three way, is there another code I should be using or do I need to add an extra bit in to get all the factors?

My data is formatted as:

Condition, Age, Sex and Year. However when I plot it, all I seem to get is males and females or adults and juveniles, when I need both for example: male adults, male juveniles, female adults, female juveniles. what I was hoping for was condition on the Y axis and year along the X axis and four bars for each year to show mean ci for each sex and age group - if that makes sense.

 

Cheers

 

H


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