This Code is made to post-procees fMRI data using Hurst exponent analysis. You can also use it to compute Hurst Exponent on any Signal. To do so you should just have a look to the file Estimator.
test file will give you a lot of example about the way to use Estimators function.
The file Optimize contains some usefull function to compute gradient and laplacian and to derivate a norm l2 of a gradient (hflap) it also works with masked data (make sure that your mask is a boolean array)
If you want to use your code on real data (typically DYNACOMP) you should first add the PATH to your data in the file ICode/loader/paths.pref