将逗号分隔的整数长字符串转换为x和y列

如何解决将逗号分隔的整数长字符串转换为x和y列

我的数据是一排很长的单行值，用逗号分隔，其中每个其他值都是x或y坐标

数据如下所示： 2622731,1387660,2621628,1444522,2619235,1681640

但是我希望它看起来像这样：

2622731,1387660

2621628,1444522

2619235,1681640

像上面的示例一样，要遍历整个文件并删除逗号并按Enter键，我该如何在R（或Stata）中自动化呢？

解决方法

在R中：

## Read in your data
## data = readLines("path/to/your_file.txt")
## Should get you something like this (using the example in your Q)
data = "2622731,1387660,2621628,1444522,2619235,1681640"
data = unlist(strsplit(data,","))
data = matrix(as.numeric(data),ncol = 2,byrow = TRUE)
data
#         [,1]    [,2]
# [1,] 2622731 1387660
# [2,] 2621628 1444522
# [3,] 2619235 1681640

那时，也许

data = as.data.frame(data)
names(data) = c("x","y")
#         x       y
# 1 2622731 1387660
# 2 2621628 1444522
# 3 2619235 1681640

,

在Stata中，可接受的R解的类似物可能涉及split和reshape long。这是另一种方法：

* data example 
clear
set obs 1
gen strL data = "2622731,1681640"

* code for data example 
replace data = subinstr(data," ",.)
set obs `=wordcount(data)/2' 
gen x = real(word(data[1],2 * _n - 1))
gen y = real(word(data[1],2 * _n))

list 

     +---------------------------------------------------------------------+
     |                                            data         x         y |
     |---------------------------------------------------------------------|
  1. | 2622731 1387660 2621628 1444522 2619235 1681640   2622731   1387660 |
  2. |                                                   2621628   1444522 |
  3. |                                                   2619235   1681640 |
     +---------------------------------------------------------------------+

,

使用scan并用matrix重塑：

s <- "2622731,1681640" # test data

matrix(scan(text = s,sep = ",quiet = TRUE),byrow = TRUE)
##         [,2]
## [1,] 2622731 1387660
## [2,] 2621628 1444522
## [3,] 2619235 1681640