Mohammad Tanvir Ahamed
2017-Jul-24 13:59 UTC
[R] Compare output of Violin plot from ggplot2 and vioplot . Need Explanation
Hi,?
I have made violin plot with both ggplot2 and vioplot package with same data.?
The results and code are as follows.?
################### ?Loading data?
data.melt <-
dget("https://gubox.box.com/shared/static/rirth0eym114afwyjxwe128sjzipzdym.txt")
################### ?Violin plot by library(vioplot)
library(vioplot)
data.use_11<- data.melt$value[data.melt$ident == 0]
data.use_12<- data.melt$value[data.melt$ident == 1]
data.use_13<- data.melt$value[data.melt$ident == 2]
data.use_14<- data.melt$value[data.melt$ident == 3]
data.use_15<- data.melt$value[data.melt$ident == 4]
data.use_16<- data.melt$value[data.melt$ident == 5]
data.use_17<- data.melt$value[data.melt$ident == 6]
data.use_18<- data.melt$value[data.melt$ident == 7]
data.use_19<- data.melt$value[data.melt$ident == 8]
data.use_110<- data.melt$value[data.melt$ident == 9]
vioplot(data.use_11,data.use_12,data.use_13,data.use_14,data.use_15,
? ? ? ? ? ? ? ?data.use_16, data.use_17,data.use_18,data.use_19,data.use_110, h
= 0.2, drawRect = FALSE)
## Violin plot?
https://i.stack.imgur.com/0taf3.jpg
##################### Violin plot by library(ggplot2)
library(ggplot2)
p ?<- ggplot(data.melt,aes(factor(ident),value))
p2 <- p +
geom_violin(scale="width",adjust=adjust.use,trim=TRUE,aes(fill=factor(ident)))
p2
## Violin plot?
https://i.stack.imgur.com/gg6Sh.jpg
##################### Questions
In those both figure, scale on x-axis (1 to 9 and 0 to 9) both are same . They
are the same event. ?
I was expecting the above 2 figures should be same (Same density presentation).
But why the density representation of both picture are different ?
Can any one please explain ??
I thought , scale parameter in geom_violin (ggplot2) plot could be a reason and
?the explanation of scale parameter said in the package. But i am not clear what
they are saying
scale :?
if "area" (default), all violins have the same area (before trimming
the tails). If "count", areas are scaled proportionally to the number
of observations. If "width", all violins have the same maximum width.
Can any one please explain what this scale parameter do and why two plot is
different ???? ?Thanks !!?
Regards.............
Tanvir Ahamed
Stockholm, Sweden???? |??mashranga at yahoo.com
[[alternative HTML version deleted]]