[R] Converting character to numeric: Error: (list) object cannot be coerced to type 'double'

[Vikram Bahure]

Dear R users,

I am facing a pretty a unusual problem while converting character to
numeric. Any input would be appreciated.

Below is the code and error faced:
---------------------------------------
*> str(cmie.dts)*
*'data.frame': 4397 obs. of 1 variable:*
* $ INE001A01036: chr "1482181740.000000" "1482181740.000000"
"1482181740.000000" "1482181740.000000" ...*
*> f1 <- as.numeric(f)*
*Error: (list) object cannot be coerced to type 'double'*
*-----------------------------------------*
*
*
Thanks in advance.

Regards
Vikram

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[Sarah Goslee]

Hi,

You need to use as.numeric on the column, not the entire data frame.

On Fri, Dec 7, 2012 at 9:23 AM, Vikram Bahure
<economic...@gmail.com> wrote:
> Dear R users,
>
> I am facing a pretty a unusual problem while converting character to
> numeric. Any input would be appreciated.
>
> Below is the code and error faced:
> ---------------------------------------
> *> str(cmie.dts)*
> *'data.frame': 4397 obs. of 1 variable:*
> * $ INE001A01036: chr "1482181740.000000" "1482181740.000000"
> "1482181740.000000" "1482181740.000000" ...*
> *> f1 <- as.numeric(f)*
> *Error: (list) object cannot be coerced to type 'double'*

What's f? You showed us str(cmie.dts), but then tried to do something with f.

But assuming they're similar, see:

> fakedata <- data.frame(col1 = c("100.01", "20.01", "30.05"), stringsAsFactors=FALSE)
> str(fakedata)
'data.frame': 3 obs. of 1 variable:
$ col1: chr "100.01" "20.01" "30.05"
> as.numeric(fakedata)

Error: (list) object cannot be coerced to type 'double'

> as.numeric(fakedata$col1)
[1] 100.01 20.01 30.05



--
Sarah Goslee
http://www.functionaldiversity.org

[Rui Barradas]

Hello,

It's the column that you want to convert, not the data.frame.

f1 <- as.numeric(f$INE001A01036)

Hope this helps,
Rui Barradas

[Vikram Bahure]

Thanks a lot. That was helpful.
My apologize, as both "cmie.dts" and 'f" are same.

On Fri, Dec 7, 2012 at 8:46 PM, Rui Barradas <ruipba...@sapo.pt> wrote:

> Hello,
>
> It's the column that you want to convert, not the data.frame.
>
> f1 <- as.numeric(f$INE001A01036)
>
> Hope this helps,
> Rui Barradas
> Em 07-12-2012 14:23, Vikram Bahure escreveu:
>
>> Dear R users,
>>
>> I am facing a pretty a unusual problem while converting character to
>> numeric. Any input would be appreciated.
>>
>> Below is the code and error faced:

>> ------------------------------**---------

>> *> str(cmie.dts)*
>> *'data.frame': 4397 obs. of 1 variable:*
>> * $ INE001A01036: chr "1482181740.000000" "1482181740.000000"
>> "1482181740.000000" "1482181740.000000" ...*
>> *> f1 <- as.numeric(f)*
>> *Error: (list) object cannot be coerced to type 'double'*

>> *-----------------------------**------------*

>> *
>>
>> *
>> Thanks in advance.
>>
>> Regards
>> Vikram
>>
>> [[alternative HTML version deleted]]
>>

>> ______________________________**________________
>> R-h...@r-project.org mailing list
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