[R] Aggregate daily data into weekly sums

[antonio rodriguez]

Or,

z<-mydata #zoo object

new.time <- as.Date(7 * floor(as.numeric(time(z))/7) + 7)
z2 <- aggregate(z, new.time, mean)




Henrique Dallazuanna escribió:
> Hi,
>
> Perhaps you can try:
>
>   
>> df
>>     
>          Date Amount
> 1  2007-06-01      1
> 2  2007-06-01      1
> 3  2007-06-04      2
> 4  2007-06-05      2
> 5  2007-06-11      3
> 6  2007-06-12      3
> 7  2007-06-12      3
> 8  2007-06-13      3
> 9  2007-06-13      3
> 10 2007-06-18      4
> 11 2007-06-18      4
> 12 2007-06-25      5
> 13 2007-06-28      5
>
> df_ok <- aggregate(df$Amount, by=list(df$Amount), FUN=sum)
> levels(df_ok$Group.1)<- paste("2007/06/Week", 1:5, sep="")
>   
> ------------------------------------------------------------------------
>
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> and provide commented, minimal, self-contained, reproducible code.
>   


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