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grpSLOPE (development version)

This is a list of software changes.

grpSLOPE 0.3.3

  • No API changes
  • Very minor changes based on feedback from CRAN review.

grpSLOPE 0.3.2

  • No API changes
  • Only changes are to the automated software tests to accommodate minor floating point arithmetic differences on M1mac

grpSLOPE 0.3.1

  • Only changes are to the automated software tests.

grpSLOPE 0.3.0

  • Removes the dependency on the R package SLOPE, because the only two functions from SLOPE that are used in grpSLOPE are being deprecated and removed from SLOPE package versions newer than 0.1.3.
  • Since the dependency on the R package SLOPE has been removed (see above), the two functions SLOPE::SLOPE_solver and SLOPE::prox_sorted_L1 (including the underlying C implementation) have been adapted from SLOPE version 0.1.3 into this version of the grpSLOPE package.
  • In addition to the default FISTA solver (function proximalGradientSolverGroupSLOPE used by default within function grpSLOPE), an ADMM solver has been implemented for the Group SLOPE model (function admmSolverGroupSLOPE ).

grpSLOPE 0.2.1

  • Fix for the installation error on r-oldrel-windows-ix86+x86_64 (R v3.2.5) in the CRAN package check results. This error was caused by the generic S3 method sigma() not being available from the stats package prior to R v3.3.0.

  • Checks for missing data in the inputs X, y and group were added in grpSLOPE().

  • A check for whether the input matrix X has columns with 0 variance is performed in grpSLOPE() when normalize=TRUE. This should prevent division by 0, when the columns of X are standardized to have norms equal to 1.