Grouped Violin Plot does not show fill by second IV

[CMaxwell]

Hi, I'm very new to R and am trying to make a Grouped Violin Plot using this code that I have found others have recommended online:

data %>%
drop_na()%>%
ggplot(aes(x=Perspective,
y=Values,
fill=Study))+
geom_violin()

My "Study" variable is a binary variable with two options, representing two separate studies I have conducted. Whenever I run the code, I just get a black and white graph showing my x and y axis, no grouping variable. I think maybe it's because I have fewer observations (about 20 less participants) in one group (Study: 1) than I do in the other (Study: 2), but I'm not sure. Is there any way to get around this with unequal sample sizes, if this is indeed the problem?

[williaml]

Hi, can you provide a reproducible example of your data?

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.…

[CMaxwell]

Hi williaml,

Here is my example dataframe

data.frame(
stringsAsFactors = FALSE,
Perspective = c("PBB","CWBB","OFBB","PBB",
"CWBB","OFBB","PBB","CWBB","OFBB","PBB","CWBB",
"OFBB","PBB","CWBB","OFBB","PBB","CWBB","OFBB","PBB",
"CWBB","OFBB","PBB","CWBB","OFBB","PBB","CWBB",
"OFBB","PBB","CWBB","OFBB","PBB","CWBB","OFBB","PBB",
"CWBB","OFBB","PBB","CWBB","OFBB","PBB","CWBB",
"OFBB","PBB","CWBB","OFBB"),
Values = c(5,4,5,5,2,4,5,2,4,3,5,
3,5,2,3,5,3,4,2,3,3,4,2,4,3,3,4,5,3,4,
2,3,3,5,1,5,2,2,3,4,1,4,5,5,5),
Study = c(1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2)
)

[M_AcostaCH]

data <- data.frame(
stringsAsFactors = FALSE,
Perspective = c("PBB","CWBB","OFBB","PBB",
"CWBB","OFBB","PBB","CWBB","OFBB","PBB","CWBB",
"OFBB","PBB","CWBB","OFBB","PBB","CWBB","OFBB","PBB",
"CWBB","OFBB","PBB","CWBB","OFBB","PBB","CWBB",
"OFBB","PBB","CWBB","OFBB","PBB","CWBB","OFBB","PBB",
"CWBB","OFBB","PBB","CWBB","OFBB","PBB","CWBB",
"OFBB","PBB","CWBB","OFBB"),
Values = c(5,4,5,5,2,4,5,2,4,3,5,
3,5,2,3,5,3,4,2,3,3,4,2,4,3,3,4,5,3,4,
2,3,3,5,1,5,2,2,3,4,1,4,5,5,5),
Study = c(1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2)
)

data$Study <- as.factor(data$Study)

data %>%
drop_na()%>%
ggplot(aes(x=Perspective,y=Values,fill=Study))+
geom_violin()

[CMaxwell]

So simple! Thanks so much for your help, M_AcostaCH!