r - Fill being ignored with group + facet_wrap in ggplot2 / geom_bar -


i suspect might using group incorrectly here, can't seem understand why fill color getting ignored in example below.

df <- data.frame(a = factor(c(1,1,2,2,1,2,1,2)),                   b = factor(c(1,2,3,4,5,6,7,2)),                   c = factor(c(1,2,1,2,1,2,1,2))) p <- ggplot(df, aes(x=b)) +   geom_bar(aes(y =  ..density.., group = c, fill=a), binwidth = 1) +    facet_wrap(~ c) +   scale_y_continuous(labels = percent_format()) +   scale_color_hue() p

any appreciated. in advance, --jt

i think understand plot you're after now. i'd this:

df <- data.frame(a = c(1,1,2,2,1,2,1,2),               b = c(1,2,3,4,5,6,7,2),               c = c(1,2,1,2,1,2,1,2))  df <- within(df, { f <- 1 / ave(b, list(c), fun=length)}) df[, 1:3] <- lapply(df[, 1:3], as.factor)  ggplot(df, aes(x = b)) + geom_bar(stat = "identity", position = "stack",             aes(y = f, group = c, fill = a), binwidth = 1) + facet_wrap(~ c) +             scale_y_continuous(labels = percent_format())

this gives plot:

enter image description here


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