英文:
How to export cleaned data from a jupyter notebook, not the original data
问题
我刚刚开始学习使用Jupyter笔记本。我有一个名为“Diseases”的数据文件。
打开数据文件
import pandas as pd
df = pd.read_csv('Diseases.csv')
选择来自名为“DIABETES”的列的数据，即选择具有糖尿病的受试者ID，是1，否则是0。
df[df.DIABETES > 1]
现在我想导出这些经过清理的数据（行数较少）
df.to_csv('diabetes-filtered.csv')
这将导出原始数据文件，而不是具有较少行的已筛选df。
我在另一个问题中看到需要使用inplace参数。但我不知道该如何使用。
英文:
I have just started to learn to use Jupyter notebook. I have a data file called 'Diseases'.
Opening data file
import pandas as pd
df = pd.read_csv('Diseases.csv')
Choosing data from a column named 'DIABETES', i.e choosing subject IDs that have diabetes, yes is 1 and no is 0.
df[df.DIABETES >1]
Now I want to export this cleaned data (that has fewer rows)
df.to_csv('diabetes-filtered.csv')
This exports the original data file, not the filtered df with fewer rows.
I saw in another question that the inplace argument needs to be used. But I don't know how.
答案1
得分: 4
你忘记将筛选后的 DataFrame 分配回 df1：
import pandas as pd
df = pd.read_csv('Diseases.csv')
df1 = df[df.DIABETES > 1]
df1.to_csv('diabetes-filtered.csv')
或者你可以将筛选和导出到文件链接在一起：
import pandas as pd
df = pd.read_csv('Diseases.csv')
df[df.DIABETES > 1].to_csv('diabetes-filtered.csv')
英文:
You forget assign back filtered DataFrame, here to df1:
import pandas as pd
df = pd.read_csv('Diseases.csv')
df1 = df[df.DIABETES >1]
df1.to_csv('diabetes-filtered.csv')
Or you can chain filtering and exporting to file:
import pandas as pd
df = pd.read_csv('Diseases.csv')
df[df.DIABETES >1].to_csv('diabetes-filtered.csv')
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