- v1.8 release, 25 May 2013
- v1.7 release, 20 May 2009
- v1.6 release, 20 August 2008
Added new fields to the options structure to specify functions for
the evaluation of the primal and dual norm, and for Euclidean
projection onto the associated primal norm ball.
Added simplified interface spg_mmv.m for the multiple measurement
vector (MMV) version of BPDN, and spg_group.m for group-sparse
BPDN.
- v1.5 release, 17 June 2008
Added simplified interfaces for basis pursuit, basis pursuit
denoise, and LASSO problems.
Added html documentation.
- v1.4 release, 19 March 2008
Fixed bug in orthogonal projection onto the weighted one-norm
ball. Thanks to Xiangrui Meng for reporting this bug.
Added demo for basis pursuit with weighted one-norm to spgdemo.m
Added check to spgl1.m to ensure  is not updated in two
consecutive iterations. Thanks to Gilles Hennenfent for reporting
this bug.
Added complexity check to projection code to ensure proper
projection.
- v1.3 release, 29 January 2008
Changed stopping criterion for Lasso mode.
Added code that allows restriction of the maximum number of
matrix-vector operators (see .maxMatvec option).
Added safeguard max(0,…) to ensure positivity when updating
. This is needed when  and the initial are both
large.
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