[英]R Replace missing elements in a textConnection with NA
如果我做
a = read.table(textConnection('a b c d
1 2 3 4
a b c
1 2 3 4','r'),header=T)
我收到一個錯誤
Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, :
line 3 did not have 4 elements
如何讓R用NA替換丟失的元素而不是失敗?
使用fill=TRUE
:
a = read.table(textConnection('a b c d
1 2 3 4
a b c
1 2 3 4','r'),header=T, fill=TRUE)
a
## a b c d
## 1 1 2 3 4
## 2 a b c NA
## 3 1 2 3 4
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