# [R] Moving average

jim holtman jholtman at gmail.com
Sun Dec 28 16:45:00 CET 2014

```could not read the data you posted; try 'dput' next time.

If it is just a 2 day moving average, try the 'filter' function:

> x <- 1:20
> x
[1]  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20
> filter(x, c(.5,.5))
Time Series:
Start = 1
End = 20
Frequency = 1
[1]  1.5  2.5  3.5  4.5  5.5  6.5  7.5  8.5  9.5 10.5 11.5 12.5 13.5 14.5
15.5 16.5 17.5 18.5 19.5   NA
>

Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.

On Sun, Dec 28, 2014 at 6:56 AM, Rolf Edberg <rolfe at algonet.se> wrote:

>
>
> How do I add a new column with 2-days moving average (from
> r-adamant(https://github.com/TotallyBullshit/radamant)) on IBM prices in a
> csv-file (ibm.csv) and then save all in a new csv file(ibm2.csv)?
>
>
>
>
> Prices
>
>
>
>
>
> Date
>
> Open
>
> High
>
> Low
>
> Close
>
> Volume
>
> Adj Close*
>
>
> Dec 26, 2014
>
> 162.27
>
> 163.09
>
> 162.01
>
> 162.34
>
> 1,912,200
>
> 162.34
>
>
> Dec 24, 2014
>
> 162.88
>
> 162.99
>
> 161.61
>
> 161.82
>
> 1,868,100
>
> 161.82
>
>
> Dec 23, 2014
>
> 162.23
>
> 162.90
>
> 161.61
>
> 162.24
>
> 4,043,300
>
> 162.24
>
>
> Dec 22, 2014
>
> 158.33
>
> 161.91
>
> 158.33
>
> 161.44
>
> 4,682,500
>
> 161.44
>
>
> Dec 19, 2014
>
> 157.49
>
> 160.41
>
> 157.49
>
> 158.51
>
> 8,864,900
>
> 158.51
>
>
>
>
>         [[alternative HTML version deleted]]
>
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```

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