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Update 06-数据汇总.md

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Original file line number	Diff line number	Diff line change
`@@ -66,6 +66,19 @@ df.sample(n=6, replace=False)`
`66`	`66`	`# 采样后放回`
`67`	`67`	`df.sample(n=6, replace=True)`
`68`	`68`
	`69`	`+# 打乱数据顺序`
	`70`	`+from sklearn.utils import shuffle`
	`71`	`+df = shuffle(df, random_state=10).reset_index(drop=True)`
	`72`	`+`
	`73`	`+# 下采样`
	`74`	`+from imblearn.under_sampling import RandomUnderSampler`
	`75`	`+RUS = RandomUnderSampler(random_state=10, ratio=0.3)`
	`76`	`+X_RUS, y_RUS = RUS.fit_sample(X_train, y_train)`
	`77`	`+X_RUS = pd.DataFrame(X_RUS, columns = list(X_train.columns))`
	`78`	`+y_RUS = pd.DataFrame(y_RUS, columns= {'y'})`
	`79`	`+y_RUS['y'].value_counts()`
	`80`	`+df_rus = y_RUS.join(X_RUS)`
	`81`	`+`
`69`	`82`	`# 数据表描述性统计`
`70`	`83`	`df.describe().round(2).T`
`71`	`84`

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