Time plotting in MATLAB

i tried to plot the time variation on X-axis but it showning today's date (Please, how can i format the x-axis to show only the time and not both time and date on the x-axis)? i do not want todays date (Jul 9,2020 to be showing on the x-axis)

Also how can i increase the number of points on x-axis to vary every on hour or 2 hours instead of 6 hours?

See the screenshot of the excel sheet & plot attached

%% Read different data sets1

% Read data sets for current1, voltage1, radiation1,time1,tem1,temp2;

% Create figure

figurea = figure(1);

% Create axes

axes1 = axes(figurea);

hold(axes1,'on');

% Create plot

plot(time,radiation1,'LineStyle','--','Color',[1 0 0]);

% Create ylabel

ylabel('Radiation','FontWeight','bold','FontName','Arial');

% Create xlabel

xlabel('TimeOfDay','FontWeight','bold','FontName','Arial');

% Create title

title('Electrical performance1');

legend('SOlarIrradiation');

Str={'Solar Variation/Time Graph', 'of LSC Device'};

txt1=text(10,3000,Str,'Color','blue','Fontsize',16);

box(axes1,'on');

xtickformat('HH:mm:ss');

Answer 1

[jonas]

You can delete the secondary label (undocumented property),

delete(ax.XAxis.SecondaryLabel)

...but I would just plot the data as duration class instead, so that the time is not associated with a date.

Assuming your data is in datetime format:

t = timeofday(time)
plot(t,radiation1,'LineStyle','--','Color',[1 0 0]);

Changing the ticks, assuming your data is in duration format:

ax = gca;
ax.XTick = hours(0):hours(2):hours(24);