The hardware and bandwidth for this mirror is donated by dogado GmbH, the Webhosting and Full Service-Cloud Provider. Check out our Wordpress Tutorial.
If you wish to report a bug, or if you are interested in having us mirror your free-software or open-source project, please feel free to contact us at mirror[@]dogado.de.

sparsediff 0.6.1

• The bundled SparseDiffEngine moves from 0.3.0 to 0.6.1, the release that ‘sparsediffpy’ 0.6.x and ‘CVXPY’ 1.9.3 use. From this release on, the package version matches the bundled engine version.
• Fixed: a parametric problem re-evaluated after sd_update_params() could return values computed from the old parameter values (engine fix #107). For a modeling layer this meant that re-solving a parametric nonlinear problem after changing a parameter returned the previous solution, reported as optimal.
• Fixed: selecting entries with repeated indices in sd_index() (for example a quadratic objective over a symmetric variable) could crash R with a bus error when the Jacobian or Hessian was evaluated (engine fix #105).
• New sd_quad_form_dense(): the quadratic form with a dense constant or parametric matrix. The parametric form follows sd_update_params(). sd_quad_form() keeps its signature and still takes a sparse constant matrix.
• Every ‘sparsediffpy’ 0.6.1 function now has an sd_* counterpart that calls the same engine routine with the same arguments; the name map is on the package help page (?sparsediff). New: sd_left_kron() and sd_right_kron() (Kronecker products, used by the next CVXPY release), the compressed-sparse-row derivative accessors sd_jacobian(), sd_get_jacobian(), sd_init_hessian(), sd_hessian() and sd_get_hessian(), and sd_get_expr_dimensions() / sd_get_expr_size(). sd_rel_entr() now dispatches on operand size like make_rel_entr.
• Fixed: sd_init_hessian_coo() crashed R when called before the Jacobian was initialized; it now initializes the Jacobian first.
• sd_rel_entr(), sd_rel_entr_first_scalar() and sd_rel_entr_second_scalar() now check that their arguments are two different variables, which the engine requires; other arguments overflowed a heap buffer (found with AddressSanitizer).
• The BLAS shim gains cblas_ddot, which the 0.6.1 engine calls.
• Fixed: the package failed to compile on Linux systems with glibc 2.36 or older (for example Debian 12), because _GNU_SOURCE was defined too late for fopencookie(). It is now set on the compiler command line.
• Documentation: the sparse matrix arguments of sd_quad_form() and sd_left_matmul() / sd_right_matmul() are compressed-sparse-row arrays, and the dense data arguments are row-major. Earlier documentation said compressed-sparse-column and column-major. The grouped help pages now have usage sections (flagged by current R-devel).
• The package now has a ‘testthat’ test suite.

sparsediff 0.4.0

• First CRAN release, bundling SparseDiffEngine 0.3.0.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.