LSST Applications
21.0.0-131-g8cabc107+528f53ee53,22.0.0+00495a2688,22.0.0+0ef2527977,22.0.0+11a2aa21cd,22.0.0+269b7e55e3,22.0.0+2c6b6677a3,22.0.0+64c1bc5aa5,22.0.0+7b3a3f865e,22.0.0+e1b6d2281c,22.0.0+ff3c34362c,22.0.1-1-g1b65d06+c95cbdf3df,22.0.1-1-g7058be7+1cf78af69b,22.0.1-1-g7dab645+2a65e40b06,22.0.1-1-g8760c09+64c1bc5aa5,22.0.1-1-g949febb+64c1bc5aa5,22.0.1-1-ga324b9c+269b7e55e3,22.0.1-1-gf9d8b05+ff3c34362c,22.0.1-10-g781e53d+9b51d1cd24,22.0.1-10-gba590ab+b9624b875d,22.0.1-13-g76f9b8d+2c6b6677a3,22.0.1-14-g22236948+57af756299,22.0.1-18-g3db9cf4b+9b7092c56c,22.0.1-18-gb17765a+2264247a6b,22.0.1-2-g8ef0a89+2c6b6677a3,22.0.1-2-gcb770ba+c99495d3c6,22.0.1-24-g2e899d296+4206820b0d,22.0.1-3-g7aa11f2+2c6b6677a3,22.0.1-3-g8c1d971+f253ffa91f,22.0.1-3-g997b569+ff3b2f8649,22.0.1-4-g1930a60+6871d0c7f6,22.0.1-4-g5b7b756+6b209d634c,22.0.1-6-ga02864e+6871d0c7f6,22.0.1-7-g3402376+a1a2182ac4,22.0.1-7-g65f59fa+54b92689ce,master-gcc5351303a+e1b6d2281c,w.2021.32
LSST Data Management Base Package
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Public Member Functions | |
def | __init__ (self, groups) |
def | copy (self) |
def | fix (self, keys=slice(None), val=None) |
def | release (self, keys=slice(None)) |
def | indexof (self, indices=slice(None)) |
def | __getitem__ (self, args) |
def | __setitem__ (self, args, val) |
def | free (self) |
def | free (self, val) |
def | full (self) |
def | full (self, val) |
def | __repr__ (self) |
Manages a vector of fit parameters with the possibility to mark a subset of them as fixed to a given value. The parameters can be organized in named slices (block of contiguous values) accessible through indexing by their name as in `StructArray`. >>> p_salt = FitParameters(['X0', 'X1', 'Color', 'Redshift']) >>> p_dice = FitParameters([('alpha', 2), ('S', 10), ('dSdT', 10), 'idark']) It is possible to modify the parameters in place. Using the indexing of slices by name simplifies somewhat the operations, as one does not need to care about the position of a slice within the entire parameter vector: >>> p_dice['idark'][0] = -1.0232E-12 >>> p_dice['S'][4] = 25.242343E-9 >>> p_dice['dSdT'][:] = 42. >>> print p_dice alpha: array([ 0., 0.]) S: array([ 0.00000000e+00, 0.00000000e+00, 0.00000000e+00, 0.00000000e+00, 2.52423430e-08, 0.00000000e+00, 0.00000000e+00, 0.00000000e+00, 0.00000000e+00, 0.00000000e+00]) dSdT: array([ 42., 42., 42., 42., 42., 42., 42., 42., 42., 42.]) idark: array([ -1.02320000e-12]) It is also possible to mark parameters as fixed to a value. >>> p_dice.fix(0, 12.) Value is optional. The above is equivalent to: >>> p_dice[0] = 12. >>> p_dice.fix(0) Again named slices simplifies the operations: >>> p_dice['S'].fix([0, -1], 12.) >>> p_dice['dSdT'].fix([0, -1]) One can fix entire slices at once: >>> p_dice['idark'].fix() >>> p_salt['Redshift'].fix(val=0.23432) The property ``full'' give access to the vector of parameters. The property "free" gives access to the free parameters: >>> print len(p_dice.free), len(p_dice.full) 17 23 Note that free relies on fancy indexing. Access thus trigger a copy. As a consequence, the following will not actually alter the data: >>> p_dice.free[0] = 12. >>> print p_dice.free[0] 0.0 It is still possible to set slices of free parameters as a contiguous vector. For example: >>> p_dice['S'].free = 12. >>> print p_dice['S'].free [ 12. 12. 12. 12. 12. 12. 12. 12.] >>> p_dice[:5].free = 4. >>> print p_dice[:5].free [ 4. 4. 4.] In particular, the typical use case which consists in updating the free parameters with the results of a fit works as expected: >>> p = np.arange(len(p_dice.free)) >>> p_dice.free = p Last the class provide a convenience function that return the index of a subset of parameters in the global free parameters vector, and -1 for fixed parameters: >>> print p_dice['dSdT'].indexof() [-1 9 10 11 12 13 14 15 16 -1] >>> print p_dice['dSdT'].indexof([1,2]) [ 9 10]
Definition at line 164 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.__init__ | ( | self, | |
groups | |||
) |
Definition at line 241 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.__getitem__ | ( | self, | |
args | |||
) |
Definition at line 276 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.__repr__ | ( | self | ) |
Definition at line 306 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.__setitem__ | ( | self, | |
args, | |||
val | |||
) |
Definition at line 287 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.copy | ( | self | ) |
Definition at line 250 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.fix | ( | self, | |
keys = slice(None) , |
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val = None |
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) |
Definition at line 263 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.free | ( | self | ) |
Definition at line 291 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.free | ( | self, | |
val | |||
) |
Definition at line 295 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.full | ( | self | ) |
Definition at line 299 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.full | ( | self, | |
val | |||
) |
Definition at line 303 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.indexof | ( | self, | |
indices = slice(None) |
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) |
Definition at line 273 of file astierCovFitParameters.py.
def lsst.cp.pipe.ptc.astierCovFitParameters.FitParameters.release | ( | self, | |
keys = slice(None) |
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) |
Definition at line 269 of file astierCovFitParameters.py.