[R] about data problem

[Jianling Fan]

Add the "stringsAsFactors = F"  when you read the data, and then
convert them to numeric.

On 20 September 2016 at 16:00, lily li <chocold12 at gmail.com> wrote:
> Yes, it is stored as factor. I can't check out any problem in the original
> data. Reread data doesn't help either. I use read.csv to read in the data,
> do you think it is better to use read.table? Thanks again.
>
> On Tue, Sep 20, 2016 at 3:55 PM, Greg Snow <538280 at gmail.com> wrote:
>
>> This indicates that your Discharge column has been stored/converted as
>> a factor (run str(df) to verify and check other columns).  This
>> usually happens when functions like read.table are left to try to
>> figure out what each column is and it finds something in that column
>> that cannot be converted to a number (possibly an oh instead of a
>> zero, an el instead of a one, or just a letter or punctuation mark
>> accidentally in the file).  You can either find the error in your
>> original data, fix it, and reread the data, or specify that the column
>> should be numeric using the colClasses argument to read.table or other
>> function.
>>
>>
>>
>> On Tue, Sep 20, 2016 at 3:46 PM, lily li <chocold12 at gmail.com> wrote:
>> > Hi R users,
>> >
>> > I have a problem in reading data.
>> > For example, part of my dataframe is like this:
>> >
>> > df
>> > month day year          Discharge
>> >    3        1   2010                6.4
>> >    3        2   2010               7.58
>> >    3        3   2010               6.82
>> >    3        4   2010               8.63
>> >    3        5   2010               8.16
>> >    3        6   2010               7.58
>> >
>> > Then if I type summary(df), why it converts the discharge data to
>> levels? I
>> > also met the same problem when reading some other csv files. How to solve
>> > this problem? Thanks.
>> >
>> > Discharge
>> > 7.58     :2
>> > 6.4       :1
>> > 6.82     :1
>> > 8.63     :1
>> > 8.16     :1
>> >
>> >         [[alternative HTML version deleted]]
>> >
>> > ______________________________________________
>> > R-help at 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.
>>
>>
>>
>> --
>> Gregory (Greg) L. Snow Ph.D.
>> 538280 at gmail.com
>>
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at 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.



-- 
Jianling Fan
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