系统:Windows 7 语言版本:Anaconda3-4.3.0.1-Windows-x86_64 编辑器:pycharm-community-2016.3.2
Part 1:示例
DataFrame
,有4列["quality_1", "measure_value", "up_tol", "down_tol"]
Part 2:代码
import pandas as pd
dict_1 = {"quality_1": ["pos_1", "pos_2", "pos_3", "pos_4", "pos_5"], "measure_value": ["6", "4", 6, 3.5, 2.5], "up_tol": [5, 5, 3, 3, 2], "down_tol": [-5, -5, -3, -3, 2]}
df = pd.DataFrame(dict_1, columns=["quality_1", "measure_value", "up_tol", "down_tol"])print(df)statistic_value = df.describe()print(statistic_value)
print("\n", "数据类型转换后")df[["measure_value"]] = df[["measure_value"]].astype(float)print(df)statistic_value = df.describe()print(statistic_value)
代码截图
执行结果
Part 3:部分代码解读
statistic_value = df.describe()
,对数值列进行统计计算,输出结果分类:df[["measure_value"]] = df[["measure_value"]].astype(float)
,对measure_value
列进行数据类型转换传送门
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