[R] about adding a column for water year

[Jeff Newmiller]

Hardly. DF$wyear is a vector, but it is being treated as though it is a scalar. Read Bert's response. 
-- 
Sent from my phone. Please excuse my brevity.

On July 4, 2017 11:17:24 AM PDT, Rui Barradas <ruipbarradas at sapo.pt> wrote:
>Hello,
>
>You have a '{' too many.
>
>for(i in 1972:1985){
>       if(DF$year==i & DF$month %in% 1:9){
>         DF$wyear <- i
>       }else{
>         DF$wyear < i-1
>       }
>     }
>  }
>
>I believe this is it.
>
>Hope this helps,
>
>Rui Barradas
>
>Em 04-07-2017 19:31, lily li escreveu:
>> Hi R users,
>> I have a question about adding a column for water year. The dataframe
>has
>> the structure below. But the wyear column just shows one year. Could
>anyone
>> help me with this problem? Thanks.
>>
>> DF
>> year   month   day      time            flow
>> 1972      1         1    1972-01-01       5
>> 1972      1         2    1972-01-02       5.5
>> 1972      1         3    1972-01-03       6
>> ...
>> 1985     12       31   1985-12-31       6
>>
>>
>> for(i in 1972:1985){
>>      if(DF$year==i & DF$month %in% 1:9){
>>        DF$wyear <- i {
>>      }else{
>>        DF$wyear < i-1
>>      }
>>    }
>> }
>>
>> 	[[alternative HTML version deleted]]
>>
>> ______________________________________________
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>>
>
>______________________________________________
>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.