v1.8.0

• Added todense method to pylops.LinearOperator
• Added pylops.signalprocessing.Bilinear,
  pylops.signalprocessing.DWT, and
  pylops.signalprocessing.DWT2 operators
• Added pylops.waveeqprocessing.PressureToVelocity,
  pylops.waveeqprocessing.UpDownComposition3Doperator, and
  pylops.waveeqprocessing.PhaseShift operators
• Fix bug in pylops.basicoperators.Kronecker
  (see Issue #125)

v1.7.0

• Added pylops.basicoperators.Gradient,
  pylops.basicoperators.Sum,
  pylops.basicoperators.FirstDirectionalDerivative, and
  pylops.basicoperators.SecondDirectionalDerivative operators
• Added pylops._ColumnLinearOperator private operator
• Added possibility to directly mix Linear operators and numpy/scipy
  2d arrays in pylops.basicoperators.VStack and
  pylops.basicoperators.HStack and
  pylops.basicoperators.BlockDiagonal operators
• Added pylops.optimization.sparsity.OMP solver

v1.6.0

• Added pylops.signalprocessing.ConvolveND operator
• Added pylops.utils.signalprocessing.nonstationary_convmtx to create
  matrix for non-stationary convolution
• Added possibility to perform seismic modelling (and inversion) with
  non-stationary wavelet in pylops.avo.poststack.PoststackLinearModelling
• Create private methods for pylops.basicoperators.Block,
  pylops.avo.poststack.PoststackLinearModelling,
  pylops.waveeqprocessing.MDC to allow calling different operators
  (e.g., from pylops-distributed or pylops-gpu) within the method

v1.5.0

• Added conj method to pylops.LinearOperator
• Added pylops.basicoperators.Kronecker,
  pylops.basicoperators.Roll, and
  pylops.basicoperators.Transpose operators
• Added pylops.signalprocessing.Fredholm1 operator
• Added pylops.optimization.sparsity.SPGL1 and
  pylops.optimization.sparsity.SplitBregman solvers
• Sped up pylops.signalprocessing.Convolve1D using
  scipy.signal.fftconvolve for multi-dimensional signals
• Changes in implementation of pylops.waveeqprocessing.MDC and
  pylops.waveeqprocessing.Marchenko to take advantage of primitive
  operators
• Added epsRL1 option to pylops.avo.poststack.PoststackInversion
  and pylops.avo.prestack.PrestackInversion to include
  TV-regularization terms by means of
  pylops.optimization.sparsity.SplitBregman solver

v1.4.0

• Added numba engine to pylops.basicoperators.Spread and
  pylops.basicoperators.Radon2D operators
• Added pylops.signalprocessing.Radon3D operator
• Added pylops.signalprocessing.Sliding2D and
  pylops.signalprocessing.Sliding3D operators
• Added pylops.signalprocessing.FFTND operator
• Added pylops.signalprocessing.Radon3D operator
• Added niter option to ``pylops.LinearOperator.eigs` method
• Added show option to pylops.optimization.sparsity.ISTA and
  pylops.optimization.sparsity.FISTA solvers
• Added pylops.waveequprocessing.seismicinterpolation,
  pylops.waveequprocessing.waveeqdecomposition` and pylops.waveequprocessing.lsm`` submodules
• Added tests for engine in various operators
• Added documentation regarding usage of pylops Docker container

v1.3.0

• Added fftw engine to FFT operator
• Added ISTA and FISTA sparse solvers
• Added possibility to broadcast (handle multi-dimensional arrays)
  to Diagonal and Restriction operators
• Added possibility Interp operator
• Added possibility Spread operator
• Added possibility Radon2D operator

v1.2.0

• Added eigs and cond methods to LinearOperator
  to estimate eigenvalues and conditioning number using scipy wrapping of
  ARPACK
• Modified default dtype for all operators to be float64 (or complex128)
  to be consistent with default dtypes used by numpy (and scipy) for real and
  complex floating point numbers.
• Added Flip operator
• Added Symmetrize operator
• Added Block operator
• Added Regression operator performing polynomial regression
  and modified LinearRegression to be a simple wrapper of
  the former when order=1
• Modified pylops.basicoperators.MatrixMult operator to work with both
  numpy ndarrays and scipy sparse matrices
• Added pylops.avo.prestack.PrestackInversion routine
• Added data weight optional input to NormalEquationsInversion
  and RegularizedInversion solvers
• Added IRLS solver

v1.1.0

• Added CausalIntegration operator

v1.0.1

• Removed quickplots from utilities and matplotlib from requirements of PyLops.
• Changed module from lops to pylops for consistency with library name (and pip install).

v1.0.0

First official release of PyLops