CODEWITHSUNDEEP
rggplot2
Surya
Surya

Reputation: 51

Aesthetic error while plotting multiple labels on x axis in histogram using ggplot

I have a data in the below format 

occupation,how_many_happy, how_many_not_happy  
Teacher, 50, 30

I am trying to plot a histogram by using both how_many_happy, how_many_not_happy on the x axis for each occupation separatly using ggplot as below 

ggplot(Occupations_vs_parties,
       aes(x = c(Occupations_vs_parties$How_many_happy, 
                 Occupations_vs_parties$How_many_not_happy))) + 
       facet_wrap(~Occupation, nrow = 4)

However I am getting the error as below 

Error: Aesthetics must be either length 1 or the same as the data (17): x

Can you please help me with the way forward. Please let me know if any inputs are needed

Thanks, Surya

Upvotes: 0

Views: 37

Answers (1)

Maurits Evers
Maurits Evers

Reputation: 50718

There are quite a few mistakes in your code. Most fundamentally, I would recommend reading up on (1) converting data from wide to long format, and (2) general ggplot syntax, especially the use of geom_histogram and geom_bar (for example you don't actually specify how you want to plot your data).

With the sample data that you give, there is also no point in facet wrapping occupation. So your example data might not be a representative minimal example.

Here is an simple barplot based on your sample data.

# Sample data
df <- read.csv(text =
    "occupation,how_many_happy,how_many_not_happy
    Teacher,50,30", sep = ",");

# Convert wide to long dataframe
library(reshape2);
df.long <- melt(df);

# (gg)plot
require(ggplot2);
ggplot(df.long, aes(x = variable, y = value)) + geom_bar(stat = "identity"),

enter image description here

If you do have different occupation levels, you can add ... + facet_wrap(~ occuptation) to your ggplot command.

Upvotes: 1

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