Question

我使用包读取器。当我用分号分隔符读取csv文件时：

library(readr)
read_csv2("A;B\n1.3;alpha\n2.345;beta", col_types = "dc")

这是我得到的答案：

Warning: 2 parsing failures.
row col               expected actual
  1   A no trailing characters   .3  
  2   A no trailing characters   .345
   A     B
1 NA alpha
2 NA  beta

换句话说，数字1.3和2.345无法识别。使用逗号分隔符一切都很好：

read_csv("A,B\n1.3,alpha\n2.345,beta", col_types = "dc")
      A     B
1 1.300 alpha
2 2.345  beta

你能重现这个吗？你知道它来自哪里吗？谢谢你的帮助。

这是我的会话信息：

sessionInfo()
R version 3.2.4 Revised (2016-03-16 r70336)
Platform: i386-w64-mingw32/i386 (32-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] readr_0.2.2

loaded via a namespace (and not attached):
[1] Rcpp_0.12.4

Answer 1

实际上，您应该使用read_delim()选项delim = ";"：

library(readr)
read_delim("A;B\n1.3;alpha\n2.345;beta", col_types = "dc", delim = ";")

Answer 2

定义分隔符以告诉R要查找的内容：库（readr） read_csv2("A;B\n1.3;alpha\n2.345;beta", col_types = "dc", sep = ";")

这将告诉它打破;

使用read_csv2函数读取文件时无法识别双打

2 个答案: