R help - Dec 2012 - Converting character to numeric: Error: (list) object cannot be coerced to type 'double'

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]]

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
<economics.vikram at 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

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]]
>
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