这是我的数据的链接。
我的目标是为所有空白单元格分配“ NA”,而与类别或数值无关。我正在使用na.strings =“”。但这不是将NA分配给所有空白单元格。
## reading the data
dat <- read.csv("data2.csv")
head(dat)
mon hr acc alc sex spd axles door reg cond1 drug1
1 8 21 No Control TRUE F 0 2 2 Physical Impairment (Eyes, Ear, Limb) A
2 7 20 No Control FALSE M 900 2 2 Inattentive D
3 3 9 No Control FALSE F 100 2 2 2004 Normal D
4 1 15 No Control FALSE M 0 2 2 Physical Impairment (Eyes, Ear, Limb) D
5 4 21 No Control FALSE 25 NA NA D
6 4 20 No Control NA F 30 2 4 Drinking Alcohol - Impaired D
inj1 PED_STATE st rac1
1 Fatal <NA> F <NA>
2 Moderate <NA> F <NA>
3 Moderate <NA> M <NA>
4 Complaint <NA> M <NA>
5 Complaint <NA> F <NA>
6 Moderate <NA> M <NA>
## using na.strings
dat2 <- read.csv("data2.csv", header=T, na.strings="")
head(dat2)
mon hr acc alc sex spd axles door reg cond1 drug1
1 8 21 No Control TRUE F 0 2 2 <NA> Physical Impairment (Eyes, Ear, Limb) A
2 7 20 No Control FALSE M 900 2 2 <NA> Inattentive D
3 3 9 No Control FALSE F 100 2 2 2004 Normal D
4 1 15 No Control FALSE M 0 2 2 <NA> Physical Impairment (Eyes, Ear, Limb) D
5 4 21 No Control FALSE 25 NA NA <NA> <NA> D
6 4 20 No Control NA F 30 2 4 <NA> Drinking Alcohol - Impaired D
inj1 PED_STATE st rac1
1 Fatal NA F NA
2 Moderate NA F NA
3 Moderate NA M NA
4 Complaint NA M NA
5 Complaint NA F NA
6 Moderate NA M NA