geom_bar的颜色 [英] colour of geom_bar

问题描述

我无法控制ggplot中条形图的颜色

I am having trouble controlling the colour of barplots in ggplot

require(mice)
require(ggplot2)
impute <- mice(nhanes, seed = 101)
ldt <-complete(impute,"long", include=TRUE)
ldt$Imputed<-ifelse(ldt$".imp"==0,"Observed","Imputed")

ggplot(ldt[!is.na(ldt$hyp),], aes(x= factor(hyp), colour=Imputed)) + 
  geom_bar() + 
  facet_wrap(~.imp, nrow = 1) +
  scale_y_continuous(expand = c(0,0))

哪个给:

但是我希望条形充满颜色，所以我尝试了:

But I would like the bars to be filled with the colour, so I tried:

ggplot(ldt[!is.na(ldt$hyp),], aes(x= factor(hyp))) + 
  geom_bar(colour = Imputed) + 
  facet_wrap(~.imp, nrow = 1) +
  scale_y_continuous(expand = c(0,0))

但这会导致错误:

Error in do.call("layer", list(mapping = mapping, data = data, stat = stat,  : 
  object 'Imputed' not found

推荐答案

第一次尝试使用 fill = Impted 代替 colour = Impted .

ggplot(ldt[!is.na(ldt$hyp),], aes(x= factor(hyp), fill=Imputed)) + 
  geom_bar() + 
  facet_wrap(~.imp, nrow = 1) +
  scale_y_continuous(expand = c(0,0))

您可以改为在 geom_bar 中设置 fill = Imputed ，但是您必须将其包装在对 aes 的调用中将会调用 ggplot .

You could set fill=Imputed in geom_bar instead, but you'd have to wrap it in a call to aes, as you would in the call to ggplot.

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