I'm trying to use R to calculate the moving average over a series of values in a matrix. The normal R mailing list search hasn't been very helpful though. There doesn't seem to be a built-in function in R will allow me to calculate moving averages. Do any packages provide one? Or do I need to write my own?

Or you can simply calculate it using filter, here's the function I use:

```
ma <- function(x, n = 5){filter(x, rep(1 / n, n), sides = 2)}
```

If you use `dplyr`

, be careful to specify `stats::filter`

in the function above.

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