mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2026-10-21 23:12:37 +00:00
Carles Fernandez
033227d133
- CHANGELOG: document Tracking_<Sig>.f_error_dump (default: false) and the new Octave/MATLAB scripts - f_error_sim.m: match cn0_m2m4_estimator when sqrt argument is negative, seed with rng() (fallback for Octave < 7), fix stale comments - plot_all_f_error_scans.m: do not require gnuplot, restore the previous graphics toolkit on exit - Use fprintf instead of printf for MATLAB compatibility
78 lines
2.9 KiB
Matlab
78 lines
2.9 KiB
Matlab
% plot_all_f_error_scans.m
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%
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% Bar-plots every scan in a scans struct array (as returned by
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% load_f_error_dump), one figure per scan -- a batch wrapper around
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% plot_f_error_scan. Optionally restrict to a subset of scans (e.g. from
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% find_f_error_scans) and/or save each figure to disk instead of leaving a
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% window open per scan (recommended once there are more than a handful).
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%
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% Usage:
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% scans = load_f_error_dump();
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% plot_all_f_error_scans(scans); % every scan, one window each
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% plot_all_f_error_scans(scans, 0.004); % + theoretical sinc^2 overlay (Galileo E1 Td)
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% plot_all_f_error_scans(scans, 0.004, find_f_error_scans(scans, 13)); % only PRN 13's scans
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% plot_all_f_error_scans(scans, 0.004, [], 'plots'); % save PNGs into ./plots/ instead of opening windows
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%
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% See also: load_f_error_dump, find_f_error_scans, plot_f_error_scan
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% -------------------------------------------------------------------------
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%
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% GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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% This file is part of GNSS-SDR.
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%
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% SPDX-FileCopyrightText: Joel Brenner, 2026. joel.brenner(at)saphyrion.ch
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% SPDX-License-Identifier: GPL-3.0-or-later
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%
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% -------------------------------------------------------------------------
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function plot_all_f_error_scans(scans, Td, idxs, save_dir)
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if ~exist('load_f_error_dump.m', 'file')
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addpath('./libs')
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end
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if nargin < 2
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Td = [];
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end
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if nargin < 3 || isempty(idxs)
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idxs = 1:numel(scans);
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end
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if nargin < 4
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save_dir = '';
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end
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if ~isempty(save_dir)
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% note: do NOT set DefaultFigureVisible='off' here -- combined with an
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% invisible figure, saveas()/print() falls back to the fltk renderer,
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% which then fails without a real X display. Leaving figures nominally
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% visible (but headlessly rendered via gnuplot) is what actually works.
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% Use gnuplot only if it is available, and restore the caller's
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% toolkit when this function returns (also on error). If gnuplot is
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% not installed (or graphics_toolkit does not exist, as in MATLAB),
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% keep the current toolkit.
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try
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prev_toolkit = graphics_toolkit();
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graphics_toolkit('gnuplot');
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restore_toolkit = onCleanup(@() graphics_toolkit(prev_toolkit));
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catch
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% keep the current graphics toolkit
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end
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if ~exist(save_dir, 'dir')
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mkdir(save_dir);
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end
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end
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for idx = idxs
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s = scans(idx);
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plot_f_error_scan(scans, idx, Td);
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if ~isempty(save_dir)
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fname = fullfile(save_dir, sprintf('scan%04d_prn%d_ch%d.png', s.scan_id, s.prn, s.channel));
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saveas(gcf(), fname);
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close(gcf());
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end
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end
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if ~isempty(save_dir)
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fprintf('Saved %d plots to %s\n', numel(idxs), save_dir);
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end
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end
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