R help - Sep 2021 - boxplots and dotplots by color group 1 and shape group2

Dear R users,

I generated a boxplots in combination of dotplots using the R code below for the
attached test file.
boxplot(value~score, data = test, outpch = NA,
xlab="",ylab="",xaxt='n',
        cex.lab=1.2, cex.axis=1.2, main="Correlation of SCNV score and SCNV
value ")
mtext(side=2, "SCNV value", line=2.3, cex = 1.3 )
stripchart(value~score, data = test,
           vertical = TRUE, method = "jitter",
           pch = 16, col = c("green",
"brown4","black", "red"),
           add = TRUE)

now I hope to add a second group variable purity_cat in the test file, labeling
it by four different shape, pch=c(3,4,16,8).

Is it possible to do add the second group variable?

Thank you,

Ding

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