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How can I set the format HH:MM to plot an array?

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Eric Bernard Dilger
Eric Bernard Dilger 2021년 7월 22일
댓글: Eric Bernard Dilger 2021년 7월 22일
I'm generating some arrays to represent the irradiance fluctuations along the day. The fluctuations about 3pm are smaller than the fluctuations during the midday and I want to show the difference. So I'm able to generate the irradiance data, but I'm having some trouble to set the time format on the x axis. I'm using this script to plot the figure below:
figure
plot(point) % Irradiance fluctuation (blue plot)
hold
plot(G_dir,'--','LineWidth',2,'Color','y')
plot(G_dif,'LineWidth',2,'Color','g')
plot(G_dir + G_dif,'LineWidth',2,'Color','r')
The algorithm generates 3500 samples for each signal (one sample per second). The signals are generate by a for loop (for t = 1 : 3500). I want the x axis to be represent in HH:MM format and I also the start time to be 15:00 and the end time to be 15:58. I appreciate any help.

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Chunru
Chunru 2021년 7월 22일
편집: Chunru 2021년 7월 22일
t = datetime(0,0,0,15,0,1:3500); % Y,M,D,HH,MM,SS
x = randn(3500, 1);
plot(t, x)
datetick('x', 'HH:MM')
xlim(t([1 end]))
  댓글 수: 1
Eric Bernard Dilger
Eric Bernard Dilger 2021년 7월 22일
Thank you @Chunru. It works very well for my application! I was trying something similar to the solution reported by you, but I wasn't understanding how to define the inicial time and the duration for the datetime function. Thank you very much!

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