The HDF5 schema
Observables within ALPS are written according to a specific hierarchical naming convention which is listed below.
Parameters
All the parameters specified in the input parameter files are stored in:
| /parameters/PARAMETERNAME
|
: parameter value
|
Monte Carlo Data
Each observable with a given OBSERVABLENAME has the following quantities stored in the hdf5-outputfile:
| /simulation/results/OBSERVABLENAME/count
|
: number of measurements
|
| /simulation/results/OBSERVABLENAME/mean/value
|
: mean value of the observable
|
| /simulation/results/OBSERVABLENAME/mean/error
|
: error of the observable
|
| /simulation/results/OBSERVABLENAME/mean/error_convergence
|
: error convergence of the observable
|
| /simulation/results/OBSERVABLENAME/variance/value
|
: variance of the observable
|
| /simulation/results/OBSERVABLENAME/tau/value
|
: autocorrelation time of the observable
|
| /simulation/results/OBSERVABLENAME/jacknife/data
|
: jacknife data of the observable
|
| /simulation/results/OBSERVABLENAME/timeseries/data
|
: timeseries of the mean of the observable
|
| /simulation/results/OBSERVABLENAME/timeseries/data2
|
: timeseries of the mean of the observable squared
|
| /simulation/results/OBSERVABLENAME/timeseries/partialbin
|
: mean of the observable in the partialbin
|
| /simulation/results/OBSERVABLENAME/timeseries/partialbin2
|
: mean of the observable squared in the partialbin
|
| /simulation/results/OBSERVABLENAME/timeseries/logbinning
|
: mean of the observable in the logbin
|
| /simulation/results/OBSERVABLENAME/timeseries/logbinning2
|
: mean of the observable squared in the logbin
|
| /simulation/results/OBSERVABLENAME/timeseries/logbinning_last
|
: mean of the observable in the last logbin
|
| /simulation/results/OBSERVABLENAME/timeseries/logbinning_count
|
: depth of the logbinning tree
|
To be deprecated? :
| /simulation/results/OBSERVABLENAME/sum
|
: mean of the observable
|
| /simulation/results/OBSERVABLENAME/sum2
|
: mean of the observable squared
|
In the non-aggregated hdf5-files (with the file name parm.taski.out.runj.h5) the path to the data stored is of the form: /simulation/realizations/NUMBER/clones/MPIPROCESSNUMBER/results/OBSERVABLENAME/... , where the system realization (e.g. disorder realization) is enumerated with NUMBER and the clone with the mpi process number MPIPROCESSNUMBER .
ED or DMRG Data
For observables obtained from an ED or DMRG simulation the data is stored at the following paths within the hdf5-output file:
| /spectrum/energies
|
: the energy eigenvalues
|
| /spectrum/sectors/NUMBER/energies
|
: the energy values for a specific sector
|
| /spectrum/sectors/NUMBER/quantumnumbers/QUANTUMNUMBERNAME
|
: the quantum number value of QUANTUMNUMBERNAME for a specific sector
|
| /spectrum/results/OBSERVABLENAME/mean/value
|
: expectation value of the observable
|
| /spectrum/results/OBSERVABLENAME/labels
|
: labels for the x-coordinate of the observable
|
| /spectrum/iteration/NUMBER/results/OBSERVABLENAME/mean/value
|
: expectation value of the observable for a specific iteration (DMRG only)
|
| /spectrum/iteration/NUMBER/results/OBSERVABLENAME/labels
|
: labels for the x-coordinate of the observable
|
Some results that do not depend on the individual states targeted for is instead at /simulation/results with a array value containing the results for the individual iterations.
Data Attributes
- jacknife/data has the attribute:
| binningtype
|
: the binning scheme, schemes are: linear or logarithmic
|
- timeseries/data and timeseries/data2 have the attributes:
| maxbinnum
|
: the maximum number of bins kept
|
| minbinsize
|
: minimal number of measurements per bin
|
| binsize
|
: number of measurements per bin
|
| binningtype
|
: the binning scheme, schemes are: linear or logarithmic
|
| discard (deprecated)
|
: bins discarded
|
- /timeseries/partialbin and /timeseries/partialbin2 have the attribute:
| count
|
: binsize of the partialbin
|
- timeseries/logbinning, timeseries/logbinning2, timeseries/logbinning_lastbin and timeseries/logbinning_counts have the attribute:
| binningtype
|
: the binning scheme, schemes are: linear or logarithmic
|
- A HistogramObservable has the attributes:
| size
|
: number of entries in the histogram
|
| min
|
: minimal x-value recordable in the histogram
|
| max
|
: maximal x-value recordable in the histogram
|
| stepsize
|
: the width of the interval dx in the histogram
|
- A SignedObservable has the attribute:
| sign
|
: observable name of the sign observable, default: Sign
|
- Observables can have the attributes:
| cannotrebin
|
: whether or not rebinning is possible, i.e. whether or not a nonlinear transformation has been performed
|
| changed (deprecated)
|
: whether or not the data has been transformed
|
| nonlinearoperations (deprecated)
|
: whether or not a nonlinear operation has been performed on the data
|
