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Simulation setting that switches or skips calculations #76

mikofski opened this Issue Oct 25, 2016 · 2 comments


1 participant

mikofski commented Oct 25, 2016

Implement methods to optionally skip a calculation and link outputs by passing a flag to the simulation settings without requiring an entirely new calculation

For example, the option to use aoi diffuse modifiers or not could depend on a simulation setting, therefore aoi modifier would be linked to aoi diffuse modifier

@mikofski mikofski self-assigned this Oct 25, 2016

@mikofski mikofski changed the title from Simulation setting that switched out skips calculations to Simulation setting that switches or skips calculations Nov 3, 2016


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mikofski commented Nov 4, 2016

Assuming that #63 is complete, then in calculation parameter formula can be a dictionary.

EG: spectral calculation with optional formulas

spectral = CalcParameter(
    dependencies=[solarposition, skymodel],
    formula=['f_sapm', 'f_fs', 'fspectrl2'],
    args={'f_sapm': {
        'data': {'time': 'time'},
        'output': {'AM': 'airmass'}
    }, 'f_fs': {
        'data': {'time': 'time'},
        'output': {'AM': 'airmass', 'pwat': 'watervap'}
    }, 'f_spectrl2': {
        'data': {'time': 'time'},
        'output': {'eqe': 'quantumeff', 'pwat': 'watervap', 'aod': 'aod', 'alpha': 'angstrom_alpha'}
    returns: ['spectral_shift'],
    skip: [1]  # a skip value for each returns, could be set to a value from any dependent calculation

Then in the simulation layer, a SimParameter can have the calculation option attribute.

settings = SimParameter(...
    calc_options={'spectral': None}
)  # None means use the skip value

~ or ~

settings = SimParameter(...
    calc_options={'spectral': 'f_sapm'}
)  # None means use the f_sapm formula and args!

Here's a sketch @anomam and I drew in our simeng2 meeting on 11/3:


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mikofski commented Nov 4, 2016

For now, we can do this by just using a different calculation class, which is more tedious, but equally effective, EG:

class SAPMSpectralCalc(calculations.Calc):
    dependencies = ['blah']
    static = [{'formula': 'f_sapm', 'args': {'data': {'times': 'times'}, 'outputs': {'am': 'am'}}, 'returns: ['m']}]

class FirstSolarSpectralCalc(calculations.Calc):
    dependencies = ['blah']
    static = [{
        'formula': 'f_fs',
        'args': {'data': {'times': 'times'},
                 'outputs': {'pwat': 'pwat', 'am': 'am'}},
        'returns: ['m']

etc. then just create more than one model, but swap out the desired calculation. In your application, you can switch between models based on the calc options desired.

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