Show only tick labels and hide tick marks: MATLAB 2024b

How do I hide the tick marks, but keep the tick labels on both y axis of a graph?

My formatting for the axis is

yyaxis left;
b = bar(data(2:end-1,:)', "stacked");
xticklabels(data(1, :));
ax1 = gca;
ax1.YGrid = "on";
ax1.YLim = [0, 1000];
...

yyaxis right;
l = plot(data(end, :), 'k');
l.LineWidth = 2;
ax2 = gca;
ax2.YLim = [0,30];

box off;

The result:

The desired format:

The ticklengths are both in your ax1 (also both in your ax2 which is the same as your ax1):

data = [2000 2010 2020;
300 400 500;
50 40 30;
10 15 20];
yyaxis left;
b = bar(data(2:end-1,:)', "stacked");
colororder('default')
xticklabels(data(1, :));
ax1 = gca;
ax1.YGrid = "on";
yyaxis right;
l = plot(data(end, :), 'k');
l.LineWidth = 2;
box off

ax1.YAxis(1).Limits = [0 1000];
ax1.YAxis(2).Limits = [0 30];
ax1.YAxis(1).TickLength = [0 0];
ax1.YAxis(2).TickLength = [0 0];