How to represent (0:10:35) as 00:00 00:10, ... in Yticklabel?

Hi,

I am facing a trouble in putting yticklabels in on my plot.

I have time in hours with 10-minutes gap (0:0.1667:0.51). I want to put labels saying 00:00, 00:10, 00:20 and 00:30 in my xticklabels. I tried following but none works!

set(gca,'YTick',(0:0.1667:0.51),'LineWidth',1.5,'FontWeight','bold',... % 0.1667 = 10-min
    'FontSize',14,'YTickLabel',...
    (0:10:35)); 

ytick3 = (0:10:35);
yticklab = datestr(minutes(ytick3),'HH:MM');
set(gca,'YTick',ytick3,'YTickLabel',yticklab);

% ytickformat('mm:ss') % alternative
% datetick('y','HH:MM:SS','keeplimits'); % alternative

Any suggetsions what is going wrong?

Thank you in advance

Answer 1

[Mrutyunjaya Hiremath]

• In your code, you are using set(gca, 'YTick', ...) to set the y-axis ticks, which are actually numerical values from 0 to 0.51 (with a 10-minute gap). Instead, you should use set(gca, 'XTick', ...) to set the x-axis ticks since you want to display time values on the x-axis.
• Here's the corrected version of your code to set the x-axis tick labels:

% Sample data (assuming you have some data plotted on the figure)
% Replace this with your actual data plotting code
xData = 0:0.1667:0.51;
yData = rand(size(xData)); % Replace with your actual y-values

% Create the plot
plot(xData, yData, 'o-');
xlabel('Time (hours)');
ylabel('Y-values');

% Set the x-axis tick positions and labels
xtick3 = 0:0.1667:0.51;
xticklab = datestr(hours(xtick3), 'HH:MM');
set(gca, 'XTick', xtick3, 'XTickLabel', xticklab);

% Optionally, you can rotate the x-axis tick labels for better visibility
xtickangle(45);

% Adjust the figure size (optional, if needed)
set(gcf, 'Position', [100, 100, 800, 400]);

• In this code, I've replaced "YTick" with "XTick" since you are setting the x-axis tick labels. Also, I've used "datestr" with "hours(xtick3)" to convert the tick values from fractional hours to a human-readable time format ('HH:MM'). The "xtickangle(45)" line rotates the x-axis tick labels by 45 degrees for better readability.
• Make sure to replace the "xData" and "yData" with your actual data plotting code, and the rest of the code should work as expected to set the x-axis tick labels to the desired time format.