[R] about data format in R

[Duncan Mackay]

Hi

Is this the output from Excel?
If so format it in Excel for a date format not a date-time format . 
Depending how the dates were inputted into Excel and the Excel setup a date
may not be a date format.
There are no rules with microsoft formatting so beware!


Regards

Duncan

Duncan Mackay
Department of Agronomy and Soil Science
University of New England
Armidale NSW 2351
Email: home: mackay at northnet.com.au

-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of lily li
Sent: Saturday, 31 December 2016 05:38
To: Rui Barradas
Cc: R mailing list
Subject: Re: [R] about data format in R

Hi Rui,

Thanks for your reply. When I read in data using my code, the first column
ranges from 0 to 1. So when I use the code you wrote, it shows the error
message:
Error in as.POSIXct.numeric(DF$Date, format = "%m/%d/%Y-%H:%M:%S") :
'origin' must be supplied


On Fri, Dec 30, 2016 at 11:23 AM, Rui Barradas <ruipbarradas at sapo.pt> wrote:

> Hello,
>
> Have you tried
>
> df$date <- as.POSIXct(dat$date, format = "%m/%d/%Y-%H:%M:%S")
>
> ?
>
> Hope this helps,
>
> Rui Barradas
>
>
>
> Em 30-12-2016 17:40, lily li escreveu:
>
>> Hi R users,
>>
>> I'm trying to read in data, and then plot time series data. However, I
>> have
>> some problems. In my dataset, the first column represents time, and in
the
>> format:
>> mm/dd/yyyy-hr:min:sec; For example, 10/01/1995-00:00:00,
>> 10/01/1995-06:00:00, etc.
>>
>> df:
>>             date                    evap     precip    intercept
>> 10/01/1995-00:00:00       1.5          2            0.2
>> 10/01/1995-12:00:00       1.7          2.2         0.1
>> 10/02/1995-00:00:00       1.5          1.8         0.3
>> ...
>>
>> My code is like this
>> file1 = read.table('df', head=T)
>>
>> When I read in data, I found that it read incorrectly. How to format when
>> read in data? Thanks.
>>
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>>
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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>> ng-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>

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