I just star working with Rstudio.

At this moment me and my partner's in Evora University need something specifics - DFA - Detrended Fluctuation Analysis. This test its available in R.

Now i present to you more information about the Test:

Description - Performs a detrended fluctuation analysis (DFA) and estimates the scaling exponent from the results. DFA is used to characterize long memory dependence in stochastic fractal time series.

Usage - DFA(x, detrend="poly1", sum.order=0, overlap=0, scale.max=trunc(length(x)/2), scale.min=NULL, scale.ratio=2, verbose=FALSE)

Your post doesn't have a question or problem you are struggling with. Are you asking where to get this function? I've found it in `fractal`

package. You can install it with `install.packages("fractal")`

.

After that you can type `?fractal::DFA`

in your console and it'll show help in the help pane. From what I see, author of the package provided example of how to perform it:

```
Examples
## calculate the scaling exponent for a random
## walk realization
DFA.walk <- DFA(rnorm(1024), detrend="poly1", sum.order=1)
## print the results
print(DFA.walk)
## plot a summary of the results
eda.plot(DFA.walk)
```

1 Like

Hi Mishabalyasin,

Thanks for the information.

José Abreu