% Variation learning-curve plots, in the style of the paper:
%   "Lines indicate mean (and SEM) across animals in the anodal (red) and
%    control (blue) groups."
% Produces TWO figures from this folder's data.csv:
%   learning_curve.png       # successes (count)   per training day
%   learning_curve_rate.png  success rate (success/attempts) per training day
% anodal / treatment = stim 1 (red); control = stim 0 (blue). Per-group N is
% read from the data. Training day is 1-indexed (our day 0 = paper "Day 1") and
% the x-axis tick labels are drawn vertically.
% Run:  matlab -batch "plotcurve"
% (Copy of analysis/matlab/variation_plot.m; see make_variation_plot.m.)

here = fileparts(mfilename('fullpath'));
if isempty(here); here = pwd; end
vname = regexprep(here, '.*[/\\]', '');

D = readtable(fullfile(here, 'data.csv'), 'TextType', 'string');
days = unique(D.day);
xd = days + 1;                    % plot as 1-indexed training day (paper axis)
red = [0.85 0.10 0.10];
blue = [0.10 0.30 0.85];

localPlot(D, days, xd, 'count', '# successes', ...
    fullfile(here, 'learning_curve.png'), vname, red, blue);
localPlot(D, days, xd, 'rate', 'success rate', ...
    fullfile(here, 'learning_curve_rate.png'), vname, red, blue);

% ------------------------------------------------------------------ helpers
function localPlot(D, days, xd, metric, ylab, outFile, vname, red, blue)
[Ma, Sa, na] = localCurve(D, 1, days, metric);   % anodal / treatment
[Mc, Sc, nc] = localCurve(D, 0, days, metric);   % control
fig = figure('Visible', 'off', 'Color', 'w', 'Position', [100 100 560 460]);
hold on
e1 = errorbar(xd, Ma, Sa, '-o', 'Color', red, 'MarkerFaceColor', red, 'LineWidth', 2);
e2 = errorbar(xd, Mc, Sc, '-o', 'Color', blue, 'MarkerFaceColor', blue, 'LineWidth', 2);
hold off
legend([e1 e2], {sprintf('anodal, N = %d', na), sprintf('control, N = %d', nc)}, ...
    'Location', 'northwest', 'Box', 'off');
xlabel('training day'); ylabel(ylab);
title(vname, 'Interpreter', 'none');
% Vertical x-axis tick labels. XTickLabelRotation / xtickangle are NOT honored
% by exportgraphics on a headless invisible figure, so draw the labels manually
% as rotated text objects (which always render).
set(gca, 'XTick', xd, 'XTickLabel', {}, 'Position', [0.13 0.20 0.80 0.70], ...
    'FontName', 'Arial', 'FontSize', 13, 'LineWidth', 1.5, 'Box', 'off');
drawnow;
yl = ylim(gca);
yb = yl(1) - 0.015 * (yl(2) - yl(1));
for k = 1:numel(xd)
    text(xd(k), yb, num2str(xd(k)), 'Parent', gca, 'Rotation', 90, ...
        'HorizontalAlignment', 'right', 'VerticalAlignment', 'middle', ...
        'FontName', 'Arial', 'FontSize', 13, 'Clipping', 'off');
end
xlh = get(gca, 'XLabel');            % push the axis label below the vertical ticks
set(xlh, 'Units', 'normalized', 'Position', [0.5 -0.15 0]);
drawnow;
exportgraphics(fig, outFile, 'Resolution', 150);
close(fig);
fprintf('%s: wrote %s (anodal N=%d, control N=%d)\n', vname, outFile, na, nc);
end

function [M, S, n] = localCurve(D, stimVal, days, metric)
%LOCALCURVE Per-day mean and SEM across the animals in a group, for a metric.
subs = unique(D.subject(D.stim == stimVal));
n = numel(subs);
X = nan(numel(days), n);
for j = 1:n
    for i = 1:numel(days)
        r = D.subject == subs(j) & D.day == days(i);
        if ~any(r); continue; end
        if strcmp(metric, 'rate')
            tot = sum(D.total(r));
            if tot > 0; X(i, j) = sum(D.success(r)) / tot; end
        else
            X(i, j) = mean(D.success(r));
        end
    end
end
M = mean(X, 2, 'omitnan');
S = std(X, [], 2, 'omitnan') ./ sqrt(sum(~isnan(X), 2));
end