During the analysis output the intermediate data to text so you don't have to run the whole thing every time

[mwakok]

• Save A
• Save B
• Save isf as single `.csv' with header with: dq, dtau, and data file
• Save plots

[mwakok]

I have added functionality to export the ddmMatrix both as netcdf (default for xarray) and csv. Saving it as an xarray (netcdf) allows for the easy addition of dq, dtau, data_file, timestamp. Storing as a csv, now contains tau and q.

This will also allow the iterative calculation of the lag times as long as they are monotonically increasing.

Example:

1. Calculate matrix for taus=np.arange(1,100)
2. Export matrix
3. Calculate matrix for taus=np.arange(100,200)
4. Update exported matrix

Changes have been merged with develop. The functions can be found in ddm/data_handling/exporting.py and it is used in the example notebook.