diff --git a/analysis/matlab/variations/unmerge_d0_13/learning_curve.png b/analysis/matlab/variations/unmerge_d0_13/learning_curve.png
index 86b93a8..2015a02 100644
Binary files a/analysis/matlab/variations/unmerge_d0_13/learning_curve.png and b/analysis/matlab/variations/unmerge_d0_13/learning_curve.png differ
diff --git a/analysis/matlab/variations/unmerge_d0_13/learning_curve_rate.png b/analysis/matlab/variations/unmerge_d0_13/learning_curve_rate.png
index 4ceb5b4..f384770 100644
Binary files a/analysis/matlab/variations/unmerge_d0_13/learning_curve_rate.png and b/analysis/matlab/variations/unmerge_d0_13/learning_curve_rate.png differ
diff --git a/analysis/matlab/variations/unmerge_d0_13/plotcurve.m b/analysis/matlab/variations/unmerge_d0_13/plotcurve.m
index f57d569..1f090e6 100644
--- a/analysis/matlab/variations/unmerge_d0_13/plotcurve.m
+++ b/analysis/matlab/variations/unmerge_d0_13/plotcurve.m
@@ -45,6 +45,7 @@ set(gca, 'XTick', xd, 'XTickLabel', {}, 'Position', [0.2 0.30 0.60 0.60], ...
     'FontName', 'Arial', 'FontSize', 13, 'LineWidth', 1.5, 'Box', 'off', 'TickDir', 'out');
 xticklabels('auto')
 set(gca, 'XTickLabelRotation', 0);   % keep x labels horizontal (no auto-rotate)
+xlim([min(xd) - 0.5, max(xd) + 0.5]); % half-day padding so points aren't on the edges
 if strcmp(metric, 'count')       % success count: y-ticks every 5 units
     yl = ylim(gca);
     set(gca, 'YTick', floor(yl(1) / 5) * 5 : 5 : ceil(yl(2) / 5) * 5);
diff --git a/analysis/matlab/variations/unmerge_d0_5/learning_curve.png b/analysis/matlab/variations/unmerge_d0_5/learning_curve.png
index d80a593..0762b88 100644
Binary files a/analysis/matlab/variations/unmerge_d0_5/learning_curve.png and b/analysis/matlab/variations/unmerge_d0_5/learning_curve.png differ
diff --git a/analysis/matlab/variations/unmerge_d0_5/learning_curve_rate.png b/analysis/matlab/variations/unmerge_d0_5/learning_curve_rate.png
index 4c622bb..2ae8aa5 100644
Binary files a/analysis/matlab/variations/unmerge_d0_5/learning_curve_rate.png and b/analysis/matlab/variations/unmerge_d0_5/learning_curve_rate.png differ
diff --git a/analysis/matlab/variations/unmerge_d0_5/plotcurve.m b/analysis/matlab/variations/unmerge_d0_5/plotcurve.m
index f57d569..1f090e6 100644
--- a/analysis/matlab/variations/unmerge_d0_5/plotcurve.m
+++ b/analysis/matlab/variations/unmerge_d0_5/plotcurve.m
@@ -45,6 +45,7 @@ set(gca, 'XTick', xd, 'XTickLabel', {}, 'Position', [0.2 0.30 0.60 0.60], ...
     'FontName', 'Arial', 'FontSize', 13, 'LineWidth', 1.5, 'Box', 'off', 'TickDir', 'out');
 xticklabels('auto')
 set(gca, 'XTickLabelRotation', 0);   % keep x labels horizontal (no auto-rotate)
+xlim([min(xd) - 0.5, max(xd) + 0.5]); % half-day padding so points aren't on the edges
 if strcmp(metric, 'count')       % success count: y-ticks every 5 units
     yl = ylim(gca);
     set(gca, 'YTick', floor(yl(1) / 5) * 5 : 5 : ceil(yl(2) / 5) * 5);
diff --git a/analysis/matlab/variations/unmerge_d6_10/learning_curve.png b/analysis/matlab/variations/unmerge_d6_10/learning_curve.png
index 134cda6..163d367 100644
Binary files a/analysis/matlab/variations/unmerge_d6_10/learning_curve.png and b/analysis/matlab/variations/unmerge_d6_10/learning_curve.png differ
diff --git a/analysis/matlab/variations/unmerge_d6_10/learning_curve_rate.png b/analysis/matlab/variations/unmerge_d6_10/learning_curve_rate.png
index f98b62f..42fdd2d 100644
Binary files a/analysis/matlab/variations/unmerge_d6_10/learning_curve_rate.png and b/analysis/matlab/variations/unmerge_d6_10/learning_curve_rate.png differ
diff --git a/analysis/matlab/variations/unmerge_d6_10/plotcurve.m b/analysis/matlab/variations/unmerge_d6_10/plotcurve.m
index f57d569..1f090e6 100644
--- a/analysis/matlab/variations/unmerge_d6_10/plotcurve.m
+++ b/analysis/matlab/variations/unmerge_d6_10/plotcurve.m
@@ -45,6 +45,7 @@ set(gca, 'XTick', xd, 'XTickLabel', {}, 'Position', [0.2 0.30 0.60 0.60], ...
     'FontName', 'Arial', 'FontSize', 13, 'LineWidth', 1.5, 'Box', 'off', 'TickDir', 'out');
 xticklabels('auto')
 set(gca, 'XTickLabelRotation', 0);   % keep x labels horizontal (no auto-rotate)
+xlim([min(xd) - 0.5, max(xd) + 0.5]); % half-day padding so points aren't on the edges
 if strcmp(metric, 'count')       % success count: y-ticks every 5 units
     yl = ylim(gca);
     set(gca, 'YTick', floor(yl(1) / 5) * 5 : 5 : ceil(yl(2) / 5) * 5);
diff --git a/analysis/matlab/variations/unmerge_d6_13/learning_curve.png b/analysis/matlab/variations/unmerge_d6_13/learning_curve.png
index 16d261b..5fd83c3 100644
Binary files a/analysis/matlab/variations/unmerge_d6_13/learning_curve.png and b/analysis/matlab/variations/unmerge_d6_13/learning_curve.png differ
diff --git a/analysis/matlab/variations/unmerge_d6_13/learning_curve_rate.png b/analysis/matlab/variations/unmerge_d6_13/learning_curve_rate.png
index 057ab8a..0d78f45 100644
Binary files a/analysis/matlab/variations/unmerge_d6_13/learning_curve_rate.png and b/analysis/matlab/variations/unmerge_d6_13/learning_curve_rate.png differ
diff --git a/analysis/matlab/variations/unmerge_d6_13/plotcurve.m b/analysis/matlab/variations/unmerge_d6_13/plotcurve.m
index f57d569..1f090e6 100644
--- a/analysis/matlab/variations/unmerge_d6_13/plotcurve.m
+++ b/analysis/matlab/variations/unmerge_d6_13/plotcurve.m
@@ -45,6 +45,7 @@ set(gca, 'XTick', xd, 'XTickLabel', {}, 'Position', [0.2 0.30 0.60 0.60], ...
     'FontName', 'Arial', 'FontSize', 13, 'LineWidth', 1.5, 'Box', 'off', 'TickDir', 'out');
 xticklabels('auto')
 set(gca, 'XTickLabelRotation', 0);   % keep x labels horizontal (no auto-rotate)
+xlim([min(xd) - 0.5, max(xd) + 0.5]); % half-day padding so points aren't on the edges
 if strcmp(metric, 'count')       % success count: y-ticks every 5 units
     yl = ylim(gca);
     set(gca, 'YTick', floor(yl(1) / 5) * 5 : 5 : ceil(yl(2) / 5) * 5);