From: Tobias Verbeke <tobias.verbeke_at_telenet.be>

Date: Sat, 19 Apr 2008 20:06:51 +0200

# different plot character for different factor level points(x, y, pch = c(3, 9, 19, 20, 13)[as.numeric(f)])

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Sat 19 Apr 2008 - 18:17:06 GMT

Date: Sat, 19 Apr 2008 20:06:51 +0200

> please, could somebody tell me how can I superpose a group of x,y-plot

*> points (using different symbols) that belong to a certain class of factor z?
**> Can't find a solution despite of hours of reading.
*

x <- rnorm(30) y <- rnorm(30) f <- factor(sample(LETTERS[1:5], 30, replace = TRUE))plot(x, y, type = "n")

# different plot character for different factor level points(x, y, pch = c(3, 9, 19, 20, 13)[as.numeric(f)])

# different colour for different factor level
plot(x, y, type = "n")

points(x, y, col = as.numeric(f), pch = 19)

**HTH,
**

Tobias

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