l2rt_control_type structure

    struct l2rt_control_type{T,INT}
      f_indexing::Bool
      error::INT
      out::INT
      print_level::INT
      start_print::INT
      stop_print::INT
      print_gap::INT
      itmin::INT
      itmax::INT
      bitmax::INT
      extra_vectors::INT
      stopping_rule::INT
      freq::INT
      stop_relative::T
      stop_absolute::T
      fraction_opt::T
      time_limit::T
      space_critical::Bool
      deallocate_error_fatal::Bool
      prefix::NTuple{31,Cchar}

detailed documentation

control derived type as a Julia structure

components

Bool f_indexing

use C or Fortran sparse matrix indexing

INT error

error and warning diagnostics occur on stream error

INT out

general output occurs on stream out

INT print_level

the level of output required is specified by print_level

INT start_print

any printing will start on this iteration

INT stop_print

any printing will stop on this iteration

INT print_gap

the number of iterations between printing

INT itmin

the minimum number of iterations allowed (-ve = no bound)

INT itmax

the maximum number of iterations allowed (-ve = no bound)

INT bitmax

the maximum number of Newton inner iterations per outer iteration allowed (-ve = no bound)

INT extra_vectors

the number of extra work vectors of length n used

INT stopping_rule

the stopping rule used: 0=1.0, 1=norm step, 2=norm step/sigma (NOT USED)

INT freq

frequency for solving the reduced tri-diagonal problem (NOT USED)

T stop_relative

the iteration stops successfully when \(\|A^Tr\|\) is less than max( stop_relative \* \(\|A^Tr_{initial} \|\), stop_absolute )

T stop_absolute

see stop_relative

T fraction_opt

an estimate of the solution that gives at least .fraction_opt times the optimal objective value will be found

T time_limit

the maximum elapsed time allowed (-ve means infinite)

Bool space_critical

if .space_critical true, every effort will be made to use as little space as possible. This may result in longer computation time

Bool deallocate_error_fatal

if .deallocate_error_fatal is true, any array/pointer deallocation error will terminate execution. Otherwise, computation will continue

NTuple{31,Cchar} prefix

all output lines will be prefixed by .prefix(2:LEN(TRIM(.prefix))-1) where .prefix contains the required string enclosed in quotes, e.g. “string” or ‘string’