R中使用complete.cases 和 na.omit来去掉包含NA的行 现在有个一data.frame datafile如下所示 Date sulfate nitrate ID 1 2015-1-1 NA NA 1 2 2015-1-2 2 6 1 3 2015-1-3 NA 3 1 4 2015-1-4 4 NA 1 5 2015-1-5 NA NA NA 6 2015-1-6 5 7 1 去掉所有包含NA的行, datafile[complete.c
A data frame is used for storing data tables. It is a list of vectors of equal length. For example, the following variable df is a data frame containing three vectors n, s, b. n = c(2, 3, 5) s = c("aa", "bb", "cc") b = c(TRUE
import numpy as np import pandas as pd This section will walk you(引导你) through the fundamental(基本的) mechanics(方法) of interacting(交互) with the data contained in a Series or DataFrame. -> (引导你去了解基本的数据交互, 通过Series, DataFrame). In the chapters to come, w