python中pd如何取每列topk

python中pd如何取每列topk

  • 核心函数.nlargest()

  • 具体实现：

    win_path = '/work/GDN/draw/win_result.csv'
FFT_df = pd.read_csv(FFT_path)
win_df_topk = {}
for col in win_df.columns:
	# 获取当前列的Top-K值
	top_k_values = win_df[col].nlargest(K)  # 使用nsmallest获取最小值，如果想要最大值使用nlargest
	win_df_topk[col] = top_k_values.tolist()
win_df_topk = pd.DataFrame(win_df_topk)
print(win_df_topk)
posted @ 2024-05-10 16:17  David_Dong  阅读(1)  评论(0)  编辑  收藏  举报