Hi,
As the error says, the replacements should have equal number of rows.
You can either do it adding NAs,
df$V1<-c(NA,rollapply(df$V1,3,mean),NA)
df
V1
1 NA
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 NA
#or,
#use any of these
#as Michael suggested
df2<-rollapply(df,3,mean,fill=NA)
Your
On Sun, Jul 8, 2012 at 12:22 PM, Stathis Kamperis wrote:
> 2012/7/8 Michael Weylandt :
>>
>>
>> On Jul 8, 2012, at 9:31 AM, Stathis Kamperis wrote:
>>
>>> Hello everyone,
>>>
>>> I have a dataframe with 1 column and I'd like to replace that column
>>> with a moving average.
>>> Example:
>>>
On Jul 8, 2012, at 9:31 AM, Stathis Kamperis wrote:
> Hello everyone,
>
> I have a dataframe with 1 column and I'd like to replace that column
> with a moving average.
> Example:
>
>> library('zoo')
>> mydat <- seq_len(10)
>> mydat
> [1] 1 2 3 4 5 6 7 8 9 10
>> df <- data.frame("V1"
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