To make a break in your plot for the desired time range, you can create a logical mask for the array "t" and filter out the time data for the data in the "datetime" vector lying in the range "6 A.M. to 6 P.M." and then plot the entire data.
For removing the excess "xtick" labels you can use the "xtick" functions to first enter the "datetime" data which has to be labelled and then create "xticklabels" for the same.
startTime = datetime('today', 'Format', 'HH:mm') + hours(6); % 6 AM today
endTime = datetime('today', 'Format', 'HH:mm') + hours(18); % 6 PM today
endTimeT= endTime + minutes(300); % Adding more entries to the "t" vector to show break in the plot
% Create a vector of datetime objects for 6 AM to 12 midnight with 60-minute intervals
t = startTime:minutes(30):endTimeT;
% Convert datetime vector to datenum
tnum = datenum(t);
numTimePoints = length(t); % Corresponding to the length of your time vector t
numDistances = 500; % Example number of distance points or another parameter
% Create a matrix D with random data
D = rand(numTimePoints, numDistances);
% Create a logical mask for the desired time range
mask = (timeofday(t) >= timeofday(startTime)) & (timeofday(t) <= timeofday(endTime));
% Filter the data
D_filtered = D(mask, :);
tnum_filtered = tnum(mask);
% Plot the filtered data
figure;
imagesc(tnum, 1:size(D, 2), D', 'Interpolation', 'bilinear');
set(gca, 'YDir', 'normal');
colorbar;
% Customize x-ticks to show only start and end times
xticks([tnum_filtered(1), tnum_filtered(end)]);
xticklabels({datestr(tnum_filtered(1), 'HH:MM'), datestr(tnum_filtered(end), 'HH:MM')});
set(gca, 'XTickLabelRotation', 45);
% Optionally, add a dashed line to indicate a break
hold on;
yLimits = ylim;
plot([tnum_filtered(end), tnum_filtered(end)], yLimits, 'k--', 'LineWidth', 2);
hold off;
% Add labels and title as needed
xlabel('Time (HH:MM)');
ylabel('Distance');
title('Data From 6 AM to 12 midnight');
For more information regarding the "xticks" and "xticklabels" functions, refer to this documentation:
