As there are many possible sources of the warning, to "sort it out" try
something like
which( is.na(<converted-vector>) & (! is.na(<original-vector>)))
B.
> On 2019-04-09, at 11:02, Richard M. Heiberger <r...@temple.edu> wrote:
>
> My guess is that numbers formatted with commas are causing an unwanted
> coercion.
> Remove the commas with gsub before converting to numeric.
>
>> as.numeric(NA)
> [1] NA
>> as.numeric("1,234,567")
> [1] NA
> Warning message:
> NAs introduced by coercion
>> as.numeric(gsub(",", "", "1,234,567"))
> [1] 1234567
>>
>
> On Tue, Apr 9, 2019 at 10:36 AM Alfredo Cortell
> <alfredo.cortell.nico...@gmail.com> wrote:
>>
>> Hi Bienvenue,
>>
>> I believe that your problem is that R can't translate "one" to a number,
>> because it is not a number. R could translate to numeric for example this
>> vector, where numbers are expressed as strings,
>>
>> c("1","4","7")
>>
>> but "one" is just letters put together, therefore R can't understand their
>> meaning, and returns NA.
>>
>> I believe that your best shot is to go with gsub, so that you translate
>> your "string letters" to "string numbers", and then you can do as.numeric
>> no problem
>>
>> Try this
>>
>> vec<-c("1",NA,"one")
>> num_vec<-gsub("one",1,vec)
>> num_vec<-as.numeric(num_vec)
>>
>> Good luck,
>>
>> Alfredo
>>
>>
>> El mar., 9 abr. 2019 a las 15:07, Duncan Murdoch (<murdoch.dun...@gmail.com>)
>> escribió:
>>
>>> On 09/04/2019 7:30 a.m., Jim Lemon wrote:
>>>> Hi Bienvenue,
>>>> Perhaps you should ask whether you really want to "sort it out". The
>>>> warning is telling you that you are converting the NA values to NA in
>>>> the returned numeric vector.
>>>
>>> I don't think that's what it is saying. I think it is saying that a
>>> non-NA value is being converted to NA, because R can't figure out what
>>> number it is. For example,
>>>
>>>> as.numeric(c("1", NA))
>>> [1] 1 NA
>>>> as.numeric(c("1", NA, "one"))
>>> [1] 1 NA NA
>>> Warning message:
>>> NAs introduced by coercion
>>>
>>>
>>> I can't think of anything more sensible
>>>> to do with NA values. You may also have character strings that cannot
>>>> be converted into numbers, which will also generate NA values.
>>>
>>> I think that's the only way that message will appear.
>>>
>>> Duncan Murdoch
>>>
>>> Maybe a
>>>> little example will help us to understand:
>>>>
>>>> charstr<-c("5","foot","2",NA,"eyes","of","blue")
>>>> as.numeric(charstr)
>>>> [1] 5 NA 2 NA NA NA NA
>>>>
>>>> Jim
>>>>
>>>> On Tue, Apr 9, 2019 at 9:16 PM bienvenidoz...@gmail.com
>>>> <bienvenidoz...@gmail.com> wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> I am applyin function as.numeric to a vector having many values as NA
>>>>> and it is giving :
>>>>> Warning message:
>>>>> NAs introduced by coercion
>>>>>
>>>>> Can anyone help me to know how to remove this warning and sor it out?
>>>>>
>>>>> Thanks
>>>>> Bienvenue
>>>>> [[alternative HTML version deleted]]
>>>>>
>>>>> ______________________________________________
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>>>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
>>>>> and provide commented, minimal, self-contained, reproducible code.
>>>>
>>>> ______________________________________________
>>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
>>>> and provide commented, minimal, self-contained, reproducible code.
>>>>
>>>
>>> ______________________________________________
>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
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>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
______________________________________________
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