# SimPEG.objective_function.BaseObjectiveFunction#

class SimPEG.objective_function.BaseObjectiveFunction(nP=None, **kwargs)[source]#

Bases: `SimPEG.props.BaseSimPEG`

Base Objective Function

Inherit this to build your own objective function. If building a regularization, have a look at `SimPEG.regularization.BaseRegularization` as there are additional methods and properties tailored to regularization of a model. Similarly, for building a data misfit, see `SimPEG.DataMisfit.BaseDataMisfit`.

Attributes

 `mapping` A SimPEG.Maps instance `nP` Number of model parameters expected.
 counter

Methods

 `__call__`(x[, f]) Call self as a function. `deriv`(x, **kwargs) First derivative of the objective function with respect to the model `deriv2`(x[, v]) Second derivative of the objective function with respect to the model `mapPair` Base class of expected maps `test`([x, num, plotIt]) Run a convergence test on both the first and second derivatives - they should be second order!

## Galleries and Tutorials using `SimPEG.objective_function.BaseObjectiveFunction`# Maps: ComboMaps

Maps: ComboMaps PF: Gravity: Tiled Inversion Linear

PF: Gravity: Tiled Inversion Linear Magnetic inversion on a TreeMesh

Magnetic inversion on a TreeMesh Magnetic Amplitude inversion on a TreeMesh

Magnetic Amplitude inversion on a TreeMesh 3D DC inversion of Dipole Dipole array

3D DC inversion of Dipole Dipole array Parametric DC inversion with Dipole Dipole array

Parametric DC inversion with Dipole Dipole array 2D inversion of Loop-Loop EM Data

2D inversion of Loop-Loop EM Data EM: TDEM: 1D: Inversion

EM: TDEM: 1D: Inversion EM: TDEM: 1D: Inversion with VTEM waveform

EM: TDEM: 1D: Inversion with VTEM waveform Method of Equivalent Sources for Removing VRM Responses

Method of Equivalent Sources for Removing VRM Responses FLOW: Richards: 1D: Inversion

FLOW: Richards: 1D: Inversion Petrophysically guided inversion (PGI): Linear example

Petrophysically guided inversion (PGI): Linear example Petrophysically guided inversion: Joint linear example with nonlinear relationships

Petrophysically guided inversion: Joint linear example with nonlinear relationships Heagy et al., 2017 1D RESOLVE and SkyTEM Bookpurnong Inversions

Heagy et al., 2017 1D RESOLVE and SkyTEM Bookpurnong Inversions Heagy et al., 2017 1D RESOLVE Bookpurnong Inversion

Heagy et al., 2017 1D RESOLVE Bookpurnong Inversion Heagy et al., 2017 1D FDEM and TDEM inversions

Heagy et al., 2017 1D FDEM and TDEM inversions PF: Gravity: Laguna del Maule Bouguer Gravity

PF: Gravity: Laguna del Maule Bouguer Gravity Straight Ray with Volume Data Misfit Term

Straight Ray with Volume Data Misfit Term 1D Inversion of for a Single Sounding

1D Inversion of for a Single Sounding Least-Squares Inversion of Gravity Anomaly Data

Least-Squares Inversion of Gravity Anomaly Data Sparse Norm Inversion of Gravity Anomaly Data

Sparse Norm Inversion of Gravity Anomaly Data Joint PGI of Gravity + Magnetic on an Octree mesh using full petrophysical information

Joint PGI of Gravity + Magnetic on an Octree mesh using full petrophysical information Joint PGI of Gravity + Magnetic on an Octree mesh without petrophysical information

Joint PGI of Gravity + Magnetic on an Octree mesh without petrophysical information 2.5D DC Resistivity and IP Least-Squares Inversion

2.5D DC Resistivity and IP Least-Squares Inversion 3D Least-Squares Inversion of DC and IP Data

3D Least-Squares Inversion of DC and IP Data Least-Squares 1D Inversion of Sounding Data

Least-Squares 1D Inversion of Sounding Data Sparse 1D Inversion of Sounding Data

Sparse 1D Inversion of Sounding Data Parametric 1D Inversion of Sounding Data

Parametric 1D Inversion of Sounding Data 2.5D DC Resistivity Least-Squares Inversion

2.5D DC Resistivity Least-Squares Inversion 2.5D DC Resistivity Inversion with Sparse Norms

2.5D DC Resistivity Inversion with Sparse Norms 3D Least-Squares Inversion of DC Resistivity Data

3D Least-Squares Inversion of DC Resistivity Data Sparse Norm Inversion for Total Magnetic Intensity Data on a Tensor Mesh

Sparse Norm Inversion for Total Magnetic Intensity Data on a Tensor Mesh Sparse Norm Inversion of 2D Seismic Tomography Data

Sparse Norm Inversion of 2D Seismic Tomography Data 1D Inversion of Time-Domain Data for a Single Sounding

1D Inversion of Time-Domain Data for a Single Sounding Linear Least-Squares Inversion

Linear Least-Squares Inversion Sparse Inversion with Iteratively Re-Weighted Least-Squares

Sparse Inversion with Iteratively Re-Weighted Least-Squares Cross-gradient Joint Inversion of Gravity and Magnetic Anomaly Data

Cross-gradient Joint Inversion of Gravity and Magnetic Anomaly Data