I am trying to do local measurements on a DMRG state, and thought of using (using Python):

parms[0]['MEASURE_LOCAL_AT[n_0]'] = "n|(0)"

In this case the operator "n" should have support only on the sites labeled by even integers, but the DMRG run does not return any output. Trying 'MEASURE_LOCAL' of course returns something like "operator n not recognized" since it does not work for odd sites.  Is the output not supposed to be included with "pyalps.loadEigenstateMeasurements()"?

Is there a way to measure local properties (and correlation functions) between even sites only? 

Can (and should) operators be defined on the unit cell as well as the sites?

/Axel Gagge