MATLAB: How to make second x axis with names of areas on chart

areasaxisdouble axis

I wanted to make a second x axis on the top of my chart, which would show dates for areas on chart:
-gray -04.04.2020
-white-05.04.2020
-green-06.04.2020
and etc. to 11.04.2020.
This is my code. For h5L1, h5L2, h5L3 I use [1008 series for x] for question purposes.
;clc
%clear all
close all
x=[1:1008];
h5L1=[1008 series for x];
h5L2=[1008 series for x]];
h5L3=[1008 series for x]];
figure
y=[1.1 1.1]
area([0 35],y, 'FaceColor', [0.9 0.9 0.9],'LineStyle','none');
hold on
area([180 323],y, 'FaceColor', [0.9 1.0 0.9],'LineStyle','none');
hold on
area([468 611],y, 'FaceColor', [0.9 0.9 1.0],'LineStyle','none');
hold on
area([756 899],y, 'FaceColor', [1.0 0.9 0.9],'LineStyle','none');
hold on
plot(x, h5L1, x, h5L2, x, h5L3)
ax=gca
xticks([1 24:24:1008])
xticklabels({'18:10','22:00','02:00','06:00','10:00','14:00','18:00','22:00','02:00','06:00','10:00','14:00','18:00','22:00','02:00','06:00','10:00','14:00','18:00','22:00','02:00','06:00','10:00','14:00','18:00','22:00','02:00','06:00','10:00','14:00','18:00','22:00','02:00','06:00','10:00','14:00','18:00','22:00','02:00','06:00','10:00','14:00','18:00'})
xtickangle(-60)
xlim([1,1008])
ylim([0,1.1])

Best Answer

You need to create two axes object. Following code shows a simple demo. Adapt it according to your requirement
fig = figure();
ax1 = axes();
ax1.Box = 'on';
plot(rand(1,10));
ax2 = axes();
hold(ax2);
ax2.Position = ax1.Position;
ax2.Color = 'none';
ax2.XAxisLocation = 'top';
ax2.YAxis.Visible = 'off';
plot(NaT, NaN); % to make x-axis datetime
ax2.XLim = [datetime(2020, 1, 1) datetime(2020, 1, 10)];
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