2d plotting and colours
TEMPL Matthias wrote:
Hi! There are more than 8 colors.
Yes, e.g. for rgb space there are 16777216, see ?rgb. Uwe Ligges
x <- rbind(matrix(rnorm(100, sd = 0.3), ncol = 2),
matrix(rnorm(100, mean = 1, sd = 0.3), ncol = 2))
(cl <- kmeans(x, i, 20))
s <- c("tomato4", "turquoise", "slateblue", "wheat", "snow", "skyblue",
"peru", "pink")
# see at:
colors()
plot(x, col = s)
points(cl$centers, col = s, pch = 8, cex=2)
Best,
Matthias
Hi! I am new to R just 3 days in it and i apologize if my questions seem very trivial and consumed your valuable time. I am coding in perl and i stumbled upon R regarding plotting good statistical graphs. I tried the kmean clustering for a large matrix ,say > 150 * 150 . I tried the example code given in the tutorial to perform 2d plot # i ranges from 2 to 10 cl <- kmeans(x, i, 20) plot(x, col = cl$cluster) points(cl$centers, col = 1:i ) I see that there are only 8 colours defined , namely black,red,green,blue,cyan,magenta,yello,gray. How should i set my colour preferences to obtain my palette of colours? I checked in the totorial which talks about R.colors and palatte , but i failed to understand how to set it. Thank You Asha
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