Weighted violin chart
It seems that using weight in ggplot has no effect. Also, using weight parameter in geom_violin results in an error.
mydata
V1 V2 V3 P1 73.6 5 R P2 75.2 5 R P3 6.5 60 R P4 41.4 15 C P5 5.4 5 C P6 18.8 10 C
p <- ggplot(mydata, aes(x=V3, y=V1)) + geom_violin(trim=FALSE) p p <- ggplot(mydata, aes(x=V3, y=V1), weight=V2) + geom_violin(trim=FALSE) p
In the code above, there is no difference between the two charts. Also, the following code ends up in an error
p <- ggplot(mydata, aes(x=V3, y=V1)) + geom_violin(trim=FALSE, weight=mydata$V2) p
Error: Aesthetics must be either length 1 or the same as the data (1024): weight Run `rlang::last_error()` to see where the error occurred.
mydata$V2
[1] 50 20 5 10 10 5 Any idea to fix that? Regards, Mahmood ________________________________
________________________________
From: Jeff Newmiller <jdnewmil at dcn.davis.ca.us>
Sent: Thursday, April 15, 2021 4:13:10 PM
To: r-help at r-project.org; Mahmood Naderan-Tahan; r-help at r-project.org
Subject: Re: [R] Weighted violin chart
Not strictly on topic on this list (ggplot2 is a contributed package)
but...
ggplot(mydata, aes(x=V3, y=V1, weight=V2 )) + geom_violin(trim=FALSE)
If you want to refer to variables in the data, they have to be listed
in the mapping.
On April 15, 2021 7:01:45 AM PDT, Mahmood Naderan-Tahan
<mahmood.naderan at ugent.be> wrote:
Hi again,
As a follow up, does anybody know how to fix the following error?
It seems that I can use a "weight" parameter in geom_violin, but I am
able to figure out what is the problem with the following code.
library(ggplot2)
mydata <- read.csv('test.csv', header=T,row.names=1)
mydata
V1 V2 V3
P1 73.6 50 R
P2 75.2 20 R
P3 6.5 5 R
P4 41.4 10 C
P5 5.4 10 C
P6 18.8 5 C
p <- ggplot(mydata, aes(x=V3, y=V1)) + geom_violin(trim=FALSE,
weight=V2)
Error in layer(data = data, mapping = mapping, stat = stat, geom =
GeomViolin, :
object 'V2' not found
wg <- as.factor(mydata$V2)
p <- ggplot(mydata, aes(x=V3, y=V1)) + geom_violin(trim=FALSE,
weight=wg)
p + geom_dotplot(binaxis='y', stackdir='center', dotsize=1)
`stat_bindot()` using `bins = 30`. Pick better value with `binwidth`.
Error: Aesthetics must be either length 1 or the same as the data
(1024): weight
Run `rlang::last_error()` to see where the error occurred.
Regards,
Mahmood
________________________________
From: Mahmood Naderan-Tahan
Sent: Monday, April 12, 2021 10:01 PM
To: r-help at r-project.org
Subject: Weighted violin chart
Hi,
I would like to know if it is possible to plot a weighted violin
chart
with R. Currently, I have
library(ggplot2)
mydata <- read.csv('test.csv', header=T,row.names=1)
mydata
V1 V2 V3 P1 73.6 50 R P2 75.2 20 R P3 6.5 5 R P4 41.4 10 C P5 5.4 10 C P6 18.8 5 C
p <- ggplot(mydata, aes(x=V3, y=V1)) + geom_violin(trim=FALSE) p + geom_dotplot(binaxis='y', stackdir='center', dotsize=1)
I would like to use V2 as the weight vector. Any idea about that?
Regards,
Mahmood
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