# Software for Transfer Operator Computations

## Tutorial Slides from a Banff Workshop in 2013

- Slides for a short tutorial on transfer operator calculations in Matlab.
The slides cover:
- Computation of a transition matrix
- Propagation of a probability measure
- Computation of almost-invariant sets
- Computation of coherent sets
- Computation of the finite-time entropy (FTE) field
- Computation of absorption/hitting times
- Computation of topological entropy

## Matlab code, data, images, from the tutorial

- Matlab code to perform the computations.

**[NOTE: Updated 22 September 2014. Minor bug fixed in coherent_vectors.m, new code threshold_coherent_nonsquareP.m to perform thresholding with non-square transition matrices]**

The three mat-files with "script" in the filename are
are the three main demos.

For the purposes of the time-constrained real-time tutorial, the code has been set up to run quickly; from a fraction of a second to two minutes.

Please see the readme file for more details.
- Matlab data files to run the Matlab code.
- Image files that are created by the Matlab code.

Higher resolution images can be obtained by altering the resolution (GAIO subdivision depth) in the matlab code.
- My relevant journal publications.