📅  最后修改于: 2022-03-11 14:55:40.539000             🧑  作者: Mango
# df[row,column]
df[1, ] # select first row and all columns from df
df[ ,8] # select all rows for column 8 from df
df[2,5] # select row 2, column 5 from df
df[1:5, ] # select rows 1 to 5 and all columns from df