9. tips || '21.06.28.

import seaborn as sns
print(sns.get_dataset_names())
tips = sns.load_dataset('tips')
print(tips.head())
# ['anagrams', 'anscombe', 'attention', 'brain_

['anagrams', 'anscombe', 'attention', 'brain_networks', 'car_crashes', 'diamonds', 'dots', 'exercise', 'flights', 'fmri', 'gammas', 'geyser', 'iris', 'mpg', 'penguins', 'planets', 'tips', 'titanic']
   total_bill   tip     sex smoker  day    time  size
0       16.99  1.01  Female     No  Sun  Dinner     2
1       10.34  1.66    Male     No  Sun  Dinner     3
2       21.01  3.50    Male     No  Sun  Dinner     3
3       23.68  3.31    Male     No  Sun  Dinner     2
4       24.59  3.61  Female     No  Sun  Dinner     4

sns.set_style('darkgrid')
# darkgrid, whitegrid, dark, white, ticks 등
# 선형회귀, 산점도
sns.regplot(x='total_bill',
           y='tip',
           data = tips)
plt.title('총지불금액과 팁')
plt.xlabel('총지불금액')
plt.ylabel('팀')
plt.show()

sns.barplot(x='time', y='tip', data=tips)