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之前有关于这个话题的问题但我仍然在努力传播这个问题。我希望每个state人都有自己的温度值列。

这是dput()我的一个数据。我会打电话的df

structure(list(date = c("2018-01-21", "2018-01-21", "2018-01-20", 
"2018-01-20", "2018-01-19", "2018-01-19", "2018-01-18", "2018-01-18", 
"2018-01-17", "2018-01-17", "2018-01-16", "2018-01-16", "2018-01-15", 
"2018-01-15", "2018-01-14", "2018-01-14", "2018-01-12", "2018-01-12", 
"2018-01-11", "2018-01-11", "2018-01-10", "2018-01-10", "2018-01-09", 
"2018-01-09", "2018-01-08", "2018-01-08", "2018-01-07", "2018-01-07", 
"2018-01-06", "2018-01-06", "2018-01-05", "2018-01-05", "2018-01-04", 
"2018-01-04", "2018-01-03", "2018-01-03", "2018-01-03", "2018-01-03", 
"2018-01-02", "2018-01-02"), tmin = c(24, 31, 31, 29, 44, 17, 
32, 7, 31, 7, 31, 6, 30, 13, 30, 1, 43, 20, 33, 52, 42, 29, 30, 
29, 26, 32, 33, -2, 29, 0, 23, 3, 19, 11, NA, -3, 22, -3, 24, 
-4), state = c("UT", "OH", "UT", "OH", "UT", "OH", "UT", "OH", 
"UT", "OH", "UT", "OH", "UT", "OH", "UT", "OH", "UT", "OH", "UT", 
"OH", "UT", "OH", "UT", "OH", "UT", "OH", "UT", "OH", "UT", "OH", 
"UT", "OH", "UT", "OH", "UT", "OH", "UT", "OH", "UT", "OH")), class = "data.frame", row.names = c(NA, 
-40L), .Names = c("date", "tmin", "state"))

我运行的代码是

df %>% spread(state,tmin)

我希望给我以下格式

date UT  OH
... ... ...

但我收到错误消息

错误:行 (36, 38), (35, 37) 的标识符重复

我尝试了一些不同的东西。我尝试过的一件事是按日期分组。我在想同一日期的行会导致spread. add_rownames()我还尝试使用然后使用创建新行spread(state,tmin),但这也未能解决问题。

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1 回答 1

9

为了spread按预期工作,生成的数据框必须具有唯一标识的行和列。对于您的数据,“日期”列是传播后的唯一唯一标识符。但是,第 36 行和第 38 行是相同的:

         date tmin state
36 2018-01-03   -3    OH
38 2018-01-03   -3    OH

这使 tidyr 无法尝试将两个数据点解析为同一行和同一列。此外,第 35 行和第 37 行都具有相同的日期和状态,再次创建了将两个不同的值放入新数据框中的相同位置的不可能的情况:

         date tmin state
35 2018-01-03   NA    UT
37 2018-01-03   22    UT

以下数据清理将使传播成为可能:

df %>% 
  filter(!is.na(tmin)) %>% # remove NA values
  unique %>% # remove duplicated rows
  spread(state, tmin)

         date OH UT
1  2018-01-02 -4 24
2  2018-01-03 -3 22
3  2018-01-04 11 19
4  2018-01-05  3 23
5  2018-01-06  0 29
...
于 2018-01-22T14:30:58.483 回答