function plot_results1(results, classLabels, cfg)
% PLOT_RESULTS1 — Scenario 1 plotting suite (Classification)
% Generates and saves:
%   (A) Confusion matrix per model
%   (B) PA/UA bars per model
%   (C) Membership functions BEFORE/AFTER training per model
%   (D) Learning curves (train/val error) per model
%   (E) Predictions vs Truth (test set) per model
%   (F) OA and Kappa across models (bars)
%   (G) Rules vs Accuracy scatter
%
% All PNGs saved under cfg.outDir.

    outDir = cfg.outDir;
    if ~exist(outDir,'dir'), mkdir(outDir); end

    nRuns   = numel(results);
    OA      = zeros(nRuns,1);
    Kap     = zeros(nRuns,1);
    nRules  = zeros(nRuns,1);
    modes   = strings(nRuns,1);
    radii   = zeros(nRuns,1);

    for i = 1:nRuns
        OA(i)     = results(i).metrics.OA;
        Kap(i)    = results(i).metrics.Kappa;
        nRules(i) = results(i).nRules;
        modes(i)  = string(results(i).mode);
        radii(i)  = results(i).radius;
    end

    % Per-model plots
    for i = 1:nRuns
        tag = sprintf('run%02d_%s_r%.2f_rules%d', ...
            i, results(i).mode, results(i).radius, results(i).nRules);

        % (A) Confusion matrix
        fig = figure('Color','w');
        confusionchart(results(i).metrics.confMat, string(classLabels), ...
            'Title', sprintf('Confusion — %s (r=%.2f, rules=%d)', ...
            results(i).mode, results(i).radius, results(i).nRules));
        exportgraphics(fig, fullfile(outDir, ['cm_' tag '.png']), 'Resolution', 200);
        close(fig);

        % (B) PA / UA bars
        fig = figure('Color','w');
        t = tiledlayout(2,1,'TileSpacing','compact','Padding','compact');
        nexttile;
        bar(results(i).metrics.PA); ylim([0 1]);
        xticks(1:numel(classLabels)); xticklabels(string(classLabels));
        ylabel('PA (Recall)');
        title(sprintf('Producer''s Accuracy — %s (r=%.2f)', results(i).mode, results(i).radius));
        nexttile;
        bar(results(i).metrics.UA); ylim([0 1]);
        xticks(1:numel(classLabels)); xticklabels(string(classLabels));
        ylabel('UA (Precision)');
        title(sprintf('User''s Accuracy — %s (r=%.2f)', results(i).mode, results(i).radius));
        exportgraphics(fig, fullfile(outDir, ['pa_ua_' tag '.png']), 'Resolution', 200);
        close(fig);

        % (C) Membership functions BEFORE/AFTER
        % Layout: 2 rows (Before/After) x D columns (inputs)
        try
            plot_mfs_before_after(results(i).initFis, results(i).fis, ...
                                  sprintf('%s (r=%.2f, %s)', results(i).mode, results(i).radius, tag), ...
                                  fullfile(outDir, ['mfs_' tag '.png']));
        catch ME
            warning('MF plot failed for %s: %s', tag, ME.message);
        end

        % (D) Learning curves (ANFIS)
        trErr = results(i).trError;    % may be vector
        ckErr = results(i).ckError;    % may be vector
        if ~isempty(trErr)
            fig = figure('Color','w');
            plot(1:numel(trErr), trErr, 'LineWidth', 1.2); hold on;
            if ~isempty(ckErr)
                plot(1:numel(ckErr), ckErr, '--', 'LineWidth', 1.2);
                legend('Training Error','Validation Error','Location','best');
            else
                legend('Training Error','Location','best');
            end
            xlabel('Epoch'); ylabel('Error'); grid on;
            title(sprintf('Learning Curve — %s (r=%.2f, rules=%d)', ...
                results(i).mode, results(i).radius, results(i).nRules));
            exportgraphics(fig, fullfile(outDir, ['learning_' tag '.png']), 'Resolution', 200);
            close(fig);
        end

        % (E) Predictions vs Truth (test set) — like report example
        if isfield(results(i),'yhat') && isfield(results(i),'ytrue')
            yhat  = results(i).yhat(:);
            ytrue = results(i).ytrue(:);
            fig = figure('Color','w');
            plot(ytrue, 'LineWidth', 1.0); hold on;
            plot(yhat,  '--', 'LineWidth', 1.0);
            xlabel('Test sample index'); ylabel('Class label');
            title(sprintf('Truth vs Prediction — %s (r=%.2f)', results(i).mode, results(i).radius));
            legend('Truth','Prediction','Location','best'); grid on;
            exportgraphics(fig, fullfile(outDir, ['pred_vs_truth_' tag '.png']), 'Resolution', 200);
            close(fig);
        end
    end

    % Across-model summaries
    [~, idxSort] = sortrows([double(modes=='class-independent'), radii], [1 2]);
    OA_s  = OA(idxSort);
    Kap_s = Kap(idxSort);
    modes_s = modes(idxSort);
    radii_s = radii(idxSort);
    labels = arrayfun(@(j) sprintf('%s\nr=%.2f', modes_s(j), radii_s(j)), 1:nRuns, 'uni', 0);

    fig = figure('Color','w');
    bar(OA_s*100); xticks(1:nRuns); xticklabels(labels); xtickangle(30);
    ylabel('Overall Accuracy (%)'); title('Overall Accuracy across models'); grid on;
    exportgraphics(fig, fullfile(outDir, 'overall_accuracy_across_models.png'), 'Resolution', 200);
    close(fig);

    fig = figure('Color','w');
    bar(Kap_s); xticks(1:nRuns); xticklabels(labels); xtickangle(30);
    ylabel('Cohen''s \kappa'); title('Kappa across models'); grid on;
    exportgraphics(fig, fullfile(outDir, 'kappa_across_models.png'), 'Resolution', 200);
    close(fig);

    fig = figure('Color','w');
    gscatter(nRules, OA*100, modes, [], [], 8);
    xlabel('#Rules'); ylabel('OA (%)'); title('Rules vs Accuracy'); grid on; legend('Location','best');
    exportgraphics(fig, fullfile(outDir, 'rules_vs_accuracy.png'), 'Resolution', 200);
    close(fig);

    % CSV summary
    T = table((1:nRuns)', modes, radii, nRules, OA, Kap, ...
        'VariableNames', {'Run','Mode','Radius','Rules','OA','Kappa'});
    writetable(T, fullfile(outDir, 'summary_scn1.csv'));
end

% ------------------ helpers ------------------
function plot_mfs_before_after(fisBefore, fisAfter, suptitleStr, outPng)
% Plot input MFs before/after in a 2xD tiled layout.
    D = numel(fisAfter.Inputs); % assume same D
    fig = figure('Color','w','Position',[100 100 1200 420]);
    t = tiledlayout(2, D, 'TileSpacing','compact','Padding','compact');

    for d = 1:D
        nexttile(d); hold on;
        try
            [xB, yB] = plotmf(fisBefore, 'input', d);
            plot(xB, yB, 'LineWidth', 1.0);
        catch
            % fallback: skip before if not available
        end
        title(sprintf('Input %d — BEFORE', d));
        ylim([0 1]); grid on;

        nexttile(D + d); hold on;
        [xA, yA] = plotmf(fisAfter, 'input', d);
        plot(xA, yA, 'LineWidth', 1.0);
        title(sprintf('Input %d — AFTER', d));
        ylim([0 1]); grid on;
    end

    sgtitle(['MFs ' suptitleStr]);
    exportgraphics(fig, outPng, 'Resolution', 200);
    close(fig);
end