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The grep function - How to find patterns in data - RPubs

## 'data.frame': 150 obs. of 5 variables: ## $ Sepal.Length: num 5.1 4.9 4.7 4.6 5 5.4 4.6 5 4.4 4.9 ...

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查詢 「R grep data frame」的人也找了：

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