Dear Emanuele,

I think tutorial 1 will show you what you need. http://alps.comp-phys.org/static/tutorials2.1.0/dmrg-01-dmrg/spin_one_half.py
'History' of measurements are available under the observable names:
Iteration Energy
Iteration Entropy
Iteration Truncation

Once you loaded the datasets in python you can them print them, or save in some separate file if you wish.


Cheers,
Michele

--
ETH Zurich
Michele Dolfi
Institute for Theoretical Physics
HIT G 32.4
Wolfgang-Pauli-Str. 27
8093 Zurich
Switzerland


+41 44 633 78 56 phone
+41 44 633 11 15 fax 





On Nov 19, 2012, at 11:04 AM, Emanuele Levi <emanuele.levi@gmail.com> wrote:

Dear ALPS users,
I am running the DMRG algorithm with python. I don't understand where the energy/entropy/trunc. err. history is recorded. 
I would like to set up a way to create three different files with the history of these three quantities.
Is there a way to do that?

Many thanks.
Kindest regards.  

--
Emanuele Levi

emanuele.levi@gmail.com