why does gsub not replace NA
0
Aim
Replace NA with "Nothing" in character vector
Input
data<-c(NA, NA, "SupineAcid", NA, NA, NA, "UprightAcid", "UprightAcid",
NA, NA, "UprightAcid", NA, "UprightAcid", NA, NA, "UprightAcid",
"TotalAcid", NA, NA, NA)
Attempts
gsub(NA,"dd",data)
This leads to all the results being NA
I've also tried with "NA" and fixed=TRUE but the same issue.
r
asked Nov 12 '18 at 18:07
Sebastian Zeki
2,43521846
add a comment |
0
Aim
Replace NA with "Nothing" in character vector
Input
data<-c(NA, NA, "SupineAcid", NA, NA, NA, "UprightAcid", "UprightAcid",
NA, NA, "UprightAcid", NA, "UprightAcid", NA, NA, "UprightAcid",
"TotalAcid", NA, NA, NA)
Attempts
gsub(NA,"dd",data)
This leads to all the results being NA
I've also tried with "NA" and fixed=TRUE but the same issue.
r
asked Nov 12 '18 at 18:07
Sebastian Zeki
2,43521846
Like I said, tried that one
– Sebastian Zeki
Nov 12 '18 at 18:09
2
You could trydata[is.na(data)]="dd"
– Lamia
Nov 12 '18 at 18:10
OK that worked. I didn't know you couldnt gsub NA
– Sebastian Zeki
Nov 12 '18 at 18:11
@Lamia Post as answer please
– Sebastian Zeki
Nov 12 '18 at 18:11
@SebastianZeki That's because there is nothing to gsub in an NA value. It's a value that saying "hey this is missing". When you use gsub you're saying I want to replace this particular string (or regex) with a certain value. Your gsub isn't matching NA because there is nothing to match - it's missing! So you need to call out the NAs directly usingis.na
– Dason
Nov 12 '18 at 18:13
add a comment |
0
0
0
Aim
Replace NA with "Nothing" in character vector
Input
data<-c(NA, NA, "SupineAcid", NA, NA, NA, "UprightAcid", "UprightAcid",
NA, NA, "UprightAcid", NA, "UprightAcid", NA, NA, "UprightAcid",
"TotalAcid", NA, NA, NA)
Attempts
gsub(NA,"dd",data)
This leads to all the results being NA
I've also tried with "NA" and fixed=TRUE but the same issue.
r
asked Nov 12 '18 at 18:07
Sebastian Zeki
2,43521846
Aim
Replace NA with "Nothing" in character vector
Input
data<-c(NA, NA, "SupineAcid", NA, NA, NA, "UprightAcid", "UprightAcid",
NA, NA, "UprightAcid", NA, "UprightAcid", NA, NA, "UprightAcid",
"TotalAcid", NA, NA, NA)
Attempts
gsub(NA,"dd",data)
This leads to all the results being NA
I've also tried with "NA" and fixed=TRUE but the same issue.
r
r
asked Nov 12 '18 at 18:07
Sebastian Zeki
2,43521846
asked Nov 12 '18 at 18:07
Sebastian Zeki
2,43521846
asked Nov 12 '18 at 18:07
Sebastian Zeki
2,43521846
asked Nov 12 '18 at 18:07
Sebastian Zeki
2,43521846
asked Nov 12 '18 at 18:07
Sebastian Zeki
2,43521846
2,43521846
Like I said, tried that one
– Sebastian Zeki
Nov 12 '18 at 18:09
2
You could trydata[is.na(data)]="dd"
– Lamia
Nov 12 '18 at 18:10
OK that worked. I didn't know you couldnt gsub NA
– Sebastian Zeki
Nov 12 '18 at 18:11
@Lamia Post as answer please
– Sebastian Zeki
Nov 12 '18 at 18:11
@SebastianZeki That's because there is nothing to gsub in an NA value. It's a value that saying "hey this is missing". When you use gsub you're saying I want to replace this particular string (or regex) with a certain value. Your gsub isn't matching NA because there is nothing to match - it's missing! So you need to call out the NAs directly usingis.na
– Dason
Nov 12 '18 at 18:13
add a comment |
Like I said, tried that one
– Sebastian Zeki
Nov 12 '18 at 18:09
2
You could trydata[is.na(data)]="dd"
– Lamia
Nov 12 '18 at 18:10
OK that worked. I didn't know you couldnt gsub NA
– Sebastian Zeki
Nov 12 '18 at 18:11
@Lamia Post as answer please
– Sebastian Zeki
Nov 12 '18 at 18:11
@SebastianZeki That's because there is nothing to gsub in an NA value. It's a value that saying "hey this is missing". When you use gsub you're saying I want to replace this particular string (or regex) with a certain value. Your gsub isn't matching NA because there is nothing to match - it's missing! So you need to call out the NAs directly usingis.na
– Dason
Nov 12 '18 at 18:13
Like I said, tried that one
– Sebastian Zeki
Nov 12 '18 at 18:09
Like I said, tried that one
– Sebastian Zeki
Nov 12 '18 at 18:09
2
2
You could try
data[is.na(data)]="dd"– Lamia
Nov 12 '18 at 18:10
You could try
data[is.na(data)]="dd"– Lamia
Nov 12 '18 at 18:10
OK that worked. I didn't know you couldnt gsub NA
– Sebastian Zeki
Nov 12 '18 at 18:11
OK that worked. I didn't know you couldnt gsub NA
– Sebastian Zeki
Nov 12 '18 at 18:11
@Lamia Post as answer please
– Sebastian Zeki
Nov 12 '18 at 18:11
@Lamia Post as answer please
– Sebastian Zeki
Nov 12 '18 at 18:11
@SebastianZeki That's because there is nothing to gsub in an NA value. It's a value that saying "hey this is missing". When you use gsub you're saying I want to replace this particular string (or regex) with a certain value. Your gsub isn't matching NA because there is nothing to match - it's missing! So you need to call out the NAs directly using
is.na– Dason
Nov 12 '18 at 18:13
@SebastianZeki That's because there is nothing to gsub in an NA value. It's a value that saying "hey this is missing". When you use gsub you're saying I want to replace this particular string (or regex) with a certain value. Your gsub isn't matching NA because there is nothing to match - it's missing! So you need to call out the NAs directly using
is.na– Dason
Nov 12 '18 at 18:13
add a comment |
3 Answers
3
active
oldest
votes
2
In order to change the NA elements in your vector, you can use the is.na function:
data[is.na(data)] = "dd"
"dd" "dd" "SupineAcid" "dd" "dd" "dd" "UprightAcid"
"UprightAcid" "dd" "dd" "UprightAcid" "dd" "UprightAcid" "dd"
"dd" "UprightAcid" "TotalAcid" "dd" "dd" "dd"
answered Nov 12 '18 at 18:13
Lamia
3,1451717
add a comment |
1
NA is not the same as "NA". If you make sure that both the first and third arguments use "NA" then it will work.
sub("NA", "dd", paste(data))
Alternately
ifelse(is.na(data), "dd", data)
answered Nov 12 '18 at 18:22
G. Grothendieck
145k9126231
add a comment |
0
Another option is replace
replace(data, is.na(data), 'dd')
answered Nov 12 '18 at 18:26
akrun
399k13187260
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
2
In order to change the NA elements in your vector, you can use the is.na function:
data[is.na(data)] = "dd"
"dd" "dd" "SupineAcid" "dd" "dd" "dd" "UprightAcid"
"UprightAcid" "dd" "dd" "UprightAcid" "dd" "UprightAcid" "dd"
"dd" "UprightAcid" "TotalAcid" "dd" "dd" "dd"
answered Nov 12 '18 at 18:13
Lamia
3,1451717
add a comment |
2
In order to change the NA elements in your vector, you can use the is.na function:
data[is.na(data)] = "dd"
"dd" "dd" "SupineAcid" "dd" "dd" "dd" "UprightAcid"
"UprightAcid" "dd" "dd" "UprightAcid" "dd" "UprightAcid" "dd"
"dd" "UprightAcid" "TotalAcid" "dd" "dd" "dd"
answered Nov 12 '18 at 18:13
Lamia
3,1451717
add a comment |
2
2
2
In order to change the NA elements in your vector, you can use the is.na function:
data[is.na(data)] = "dd"
"dd" "dd" "SupineAcid" "dd" "dd" "dd" "UprightAcid"
"UprightAcid" "dd" "dd" "UprightAcid" "dd" "UprightAcid" "dd"
"dd" "UprightAcid" "TotalAcid" "dd" "dd" "dd"
answered Nov 12 '18 at 18:13
Lamia
3,1451717
In order to change the NA elements in your vector, you can use the is.na function:
data[is.na(data)] = "dd"
"dd" "dd" "SupineAcid" "dd" "dd" "dd" "UprightAcid"
"UprightAcid" "dd" "dd" "UprightAcid" "dd" "UprightAcid" "dd"
"dd" "UprightAcid" "TotalAcid" "dd" "dd" "dd"
answered Nov 12 '18 at 18:13
Lamia
3,1451717
answered Nov 12 '18 at 18:13
Lamia
3,1451717
answered Nov 12 '18 at 18:13
Lamia
3,1451717
answered Nov 12 '18 at 18:13
Lamia
3,1451717
3,1451717
add a comment |
add a comment |
1
NA is not the same as "NA". If you make sure that both the first and third arguments use "NA" then it will work.
sub("NA", "dd", paste(data))
Alternately
ifelse(is.na(data), "dd", data)
answered Nov 12 '18 at 18:22
G. Grothendieck
145k9126231
add a comment |
1
NA is not the same as "NA". If you make sure that both the first and third arguments use "NA" then it will work.
sub("NA", "dd", paste(data))
Alternately
ifelse(is.na(data), "dd", data)
answered Nov 12 '18 at 18:22
G. Grothendieck
145k9126231
add a comment |
1
1
1
NA is not the same as "NA". If you make sure that both the first and third arguments use "NA" then it will work.
sub("NA", "dd", paste(data))
Alternately
ifelse(is.na(data), "dd", data)
answered Nov 12 '18 at 18:22
G. Grothendieck
145k9126231
NA is not the same as "NA". If you make sure that both the first and third arguments use "NA" then it will work.
sub("NA", "dd", paste(data))
Alternately
ifelse(is.na(data), "dd", data)
answered Nov 12 '18 at 18:22
G. Grothendieck
145k9126231
answered Nov 12 '18 at 18:22
G. Grothendieck
145k9126231
answered Nov 12 '18 at 18:22
G. Grothendieck
145k9126231
answered Nov 12 '18 at 18:22
G. Grothendieck
145k9126231
145k9126231
add a comment |
add a comment |
0
Another option is replace
replace(data, is.na(data), 'dd')
answered Nov 12 '18 at 18:26
akrun
399k13187260
add a comment |
0
Another option is replace
replace(data, is.na(data), 'dd')
answered Nov 12 '18 at 18:26
akrun
399k13187260
add a comment |
0
0
0
Another option is replace
replace(data, is.na(data), 'dd')
answered Nov 12 '18 at 18:26
akrun
399k13187260
Another option is replace
replace(data, is.na(data), 'dd')
answered Nov 12 '18 at 18:26
akrun
399k13187260
answered Nov 12 '18 at 18:26
akrun
399k13187260
answered Nov 12 '18 at 18:26
akrun
399k13187260
answered Nov 12 '18 at 18:26
akrun
399k13187260
399k13187260
add a comment |
add a comment |
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Like I said, tried that one
– Sebastian Zeki
Nov 12 '18 at 18:09
2
You could try
data[is.na(data)]="dd"– Lamia
Nov 12 '18 at 18:10
OK that worked. I didn't know you couldnt gsub NA
– Sebastian Zeki
Nov 12 '18 at 18:11
@Lamia Post as answer please
– Sebastian Zeki
Nov 12 '18 at 18:11
@SebastianZeki That's because there is nothing to gsub in an NA value. It's a value that saying "hey this is missing". When you use gsub you're saying I want to replace this particular string (or regex) with a certain value. Your gsub isn't matching NA because there is nothing to match - it's missing! So you need to call out the NAs directly using
is.na– Dason
Nov 12 '18 at 18:13