CODEWITHSUNDEEP
rggplot2
Sam
Sam

Reputation: 11

Overlapping bar plot in ggplot2

I'm trying to hide a variable in a stacked bar chart in a dataset.
Below is the dataset:

Upvotes: 1

Views: 387

Answers (1)

Allan Cameron
Allan Cameron

Reputation: 173793

First convert Ethnic.group to a factor, then filter the data frame to only contain the entries where Ethnic.group != "Asian". This will mean that Ethnic.group "remembers" that there is a category called "Asian", even though it contains no actual "Asian" values.

To use this "memory" in your plot, add + scale_fill_discrete(drop = FALSE) to include all factor levels even when some of the levels are not represented in the data.

These two steps will keep "Asian" in the legend as a possible value, but without any actual entries on the plot, and maintain the colours that were present in your original plot.

popByAgeEthnicity %>%
  mutate(Ethnic.group = factor(Ethnic.group)) %>%
  filter(Ethnic.group != "Asian") %>%
  ggplot(aes(Age.group, Pop, fill = Ethnic.group)) +
  geom_col() +
  scale_fill_discrete(drop = FALSE)

enter image description here

As a side note, writing geom_bar(stat = "identity") is just a long way of writing geom_col()

Upvotes: 3

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