A、 SELECT
B、 HAVING
C、 GROUP BY
D、 WHERE
答案:C
A、 SELECT
B、 HAVING
C、 GROUP BY
D、 WHERE
答案:C
A. 概率密度图
B. 箱形图
C. 饼图
D. 散点图
A. 模型发布
B. 特征重要性排序
C. 异常值处理
D. 缺失值处理
A. loc
B. iloc
C. columns
D. values
A. Files
B. Running
C. Clusters
D. Nbextensions
A. a[1:4]
B. a*2
C. h in a
D. a + b
A. NumPy
B. Seaborn
C. Matplotlib
D. 以上都不是
A. SELECT a FROM t2;
B. SELECT DISTINCT a FROM t2;
C. SELECT a,count(*) FROM t2 group by a;
D. SELECT a,b,count(*) FROM t2 group by a,b;
A. import numpy as np
B. from matplotlib import pyplot as plt
C. from xgboost import plot_importance
D. import pandas as pd
A. 线性回归
B. 逻辑回归
C. 随机森林
D. 支持向量机