示例#1
0
def make_test_model(nsources=100,
                    npix=500,
                    ampl=100,
                    fwhm=30,
                    random_state='random-seed'):
    """Create a model of several Gaussian sources.

    Parameters
    ----------
    random_state : {int, 'random-seed', 'global-rng', `~numpy.random.RandomState`}
        Defines random number generator initialisation.
        Passed to `~gammapy.utils.random.get_random_state`.
    """
    from sherpa.astro.ui import set_source
    from morphology.utils import _set, _name

    # initialise random number generator
    random_state = get_random_state(random_state)

    model = ' + '.join([_name(ii) for ii in range(nsources)])
    set_source(model)
    for ii in range(nsources):
        _set(_name(ii), 'xpos', random_state.uniform(0, npix))
        _set(_name(ii), 'ypos', random_state.uniform(0, npix))
        _set(_name(ii), 'ampl', random_state.uniform(0, ampl))
        _set(_name(ii), 'fwhm', random_state.uniform(0, fwhm))
示例#2
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def make_test_model(nsources=100, npix=500, ampl=100, fwhm=30):
    """Create a model of several Gaussian sources"""
    from numpy.random import random
    from sherpa.astro.ui import set_source
    from morphology.utils import _set, _name
    model = ' + '.join([_name(ii) for ii in range(nsources)])
    set_source(model)
    for ii in range(nsources):
        _set(_name(ii), 'xpos', npix * random())
        _set(_name(ii), 'ypos', npix * random())
        _set(_name(ii), 'ampl', ampl * random())
        _set(_name(ii), 'fwhm', fwhm * random())
示例#3
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文件: model.py 项目: zblz/gammapy
def make_test_model(nsources=100, npix=500, ampl=100, fwhm=30):
    """Create a model of several Gaussian sources.
    """
    from numpy.random import random
    from sherpa.astro.ui import set_source
    from morphology.utils import _set, _name
    model = ' + '.join([_name(ii) for ii in range(nsources)])
    set_source(model)
    for ii in range(nsources):
        _set(_name(ii), 'xpos', npix * random())
        _set(_name(ii), 'ypos', npix * random())
        _set(_name(ii), 'ampl', ampl * random())
        _set(_name(ii), 'fwhm', fwhm * random())
示例#4
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def make_test_model(nsources=100, npix=500, ampl=100, fwhm=30, random_state="random-seed"):
    """Create a model of several Gaussian sources.

    Parameters
    ----------
    random_state : {int, 'random-seed', 'global-rng', `~numpy.random.RandomState`}
        Defines random number generator initialisation.
        Passed to `~gammapy.utils.random.get_random_state`.
    """
    from sherpa.astro.ui import set_source
    from morphology.utils import _set, _name

    # initialise random number generator
    random_state = get_random_state(random_state)

    model = " + ".join([_name(ii) for ii in range(nsources)])
    set_source(model)
    for ii in range(nsources):
        _set(_name(ii), "xpos", random_state.uniform(0, npix))
        _set(_name(ii), "ypos", random_state.uniform(0, npix))
        _set(_name(ii), "ampl", random_state.uniform(0, ampl))
        _set(_name(ii), "fwhm", random_state.uniform(0, fwhm))