Adding and customisng a single tick mark

hello.

I want to add a single tick mark to the current tickmarks:

set(gca, 'XTick', sort([0.018, get(gca, 'XTick')]));

But I want its text to be smaller and a different colour to the rest. Is this possible

Answer 1

[Walter Roberson]

new_tick = 0.018;
new_fontsize = 6;
new_tick_rgb = [0.28, 0.02, 0.03];   %Bulgarian Rose

ax = gca;
xruler = ax.XRuler;
old_fmt = xruler.TickLabelFormat;
old_xticks = xruler.TickValues;
old_labels = sprintfc(old_fmt, old_xticks);
new_label = sprintf(['%s%g,%g,%g%s%d%s' old_fmt], '\color[rgb]{', new_tick_rgb, '}\fontsize{', new_fontsize, '}', new_tick);
all_xticks = [old_xticks, new_tick];
all_xlabels = [old_labels, new_label];
[new_xticks, sort_order] = sort(all_xticks);
new_labels = all_xlabels(sort_order);

set(xruler, 'TickValues', new_xticks, 'TickLabels', new_labels);

[Jason]

Perfect, thankyou very much