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manopt/manopt/tools/statscounters.m
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function S = statscounters(names) | |
% Create a structure for statsfunhelper to record counters in manopt | |
% | |
% function S = statscounters(name) | |
% function S = statscounters(names) | |
% | |
% The input can either be one string containing a chosen name for a | |
% counter, or a cell containing multiple strings designating multiple | |
% counters. The names must be valid field names for Matlab structures. | |
% | |
% The output is a structure S. For each input string, S contains a field | |
% with that name. That field contains a function handle. Calling that | |
% function with appropriate inputs (problem, x, stats, store) returns the | |
% value of the counter saved in store and whose name is the field name. | |
% | |
% This manopt tool is meant to be used in conjunction with incrementcounter | |
% and with statsfunhelper. In the examples folder of the toolbox, the | |
% example named using_counters demonstrates how to use this feature. | |
% | |
% See also: statscounter statsfunhelper using_counters | |
% This file is part of Manopt: www.manopt.org. | |
% Original author: Nicolas Boumal, July 27, 2018. | |
% Contributors: | |
% Change log: | |
% If we receive only one string as input, place it in a cell so that | |
% the rest of this function's code works the same in both cases. | |
if ischar(names) | |
names = {names}; | |
end | |
assert(iscell(names), ['names must be either one string, or a ' ... | |
'cell of strings. Each string must be a ' ... | |
'valid field name for structures.']); | |
for k = 1 : numel(names) | |
name = names{k}; | |
assert(isvarname(name) || iskeyword(name), ... | |
'Each input string must be a valid structure field name.'); | |
S.(name) = @(problem, x, stats, store) ... | |
getcountervalue(problem, x, stats, store, name); | |
end | |
end | |
function val = getcountervalue(problem, x, stats, store, name) %#ok<INUSL> | |
if isfield(store.shared, name) | |
val = store.shared.(name); | |
else | |
val = 0; | |
end | |
end |