Question

我正在从

下载数据集

url = "http://robjhyndman.com/tsdldata/misc/kings.dat"

使用read.csv有效，

read.csv(url, comment.char="#")

但是read.table

read.table(url, comment.char="#")

给出错误：

Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings,  : 
  line 2 did not have 8 elements

Answer 1

如果你看一下这个文件的前几行，你会得到：

Age of Death of Successive Kings of England
#starting with William the Conqueror
#Source: McNeill, "Interactive Data Analysis"
60
43
67

使用read.table时，默认的分隔符参数为sep=""，帮助文件解释为：

sep: the field separator character.  Values on each line of the
     file are separated by this character.  If 'sep = ""' (the
     default for 'read.table') the separator is 'white space',
     that is one or more spaces, tabs, newlines or carriage
     returns.

因此第一行被视为八个值。当read.table获得数值时，我们会收到错误：

Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings,  : 
  line 2 did not have 8 elements

read.csv函数使用逗号作为分隔符，因此第一行只是一个值。

comment.char参数存在问题

1 个答案: