Histogram for each species

library(tidyverse)

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# Importing the dataset
data = iris

data %>%
  gather(Attributes, Value, 1:4) %>%
  ggplot(aes(x=Value, fill=Attributes)) +
  geom_histogram(colour="black") +
  facet_wrap(~Species) +
  theme_bw() +
  labs(x="Values", y="Frequency",
       title="Iris data set",
       subtitle="Histogram for each species") +
  theme(legend.title=element_blank(),
        legend.position="bottom")

## `stat_bin()` using `bins = 30`. Pick better value with `binwidth`.