plot time in HH:MM ix x axis

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Ron Amar 2022-1-24

评论： Ankit 2022-1-24

Hi, I have 16000 sampled data. I want to plot it vs time in HH:mm format (ex 15:33)

I know when the first data point was taken (12:33:00) and I sampled 1 per 10 seconds.

I cant figure out how to do this

Ankit 2022-1-24

You need to change the format using datetick.

date={'15:10:34.600 AM 2/26/2017','15:20:34.700 AM 2/26/2017','15:30:34.800 AM 2/26/2017','15:40:34.900 AM 2/26/2017'};

timeFormat='HH:MM:SS.FFF AM mm/dd/yyyy';

xdatenum=datenum(date,timeFormat);

data=0:3;

plot(xdatenum,data,'*');

datetick('x','HH:MM');

Steven Lord 2022-1-24

Instead of using a datetime, which requires date information, I'd use a duration array to plot this data.

t = duration(15, 33, 1:100:5000);

x = randn(50, 1);

plot(t, x)

xlim(t([1 end]))

Change the Format of the duration array to change how it is displayed as labels.

t = duration(15, 33, 1:100:5000, 'Format', 'hh:mm'); % no second data

x = randn(50, 1);

plot(t, x)

xlim(t([1 end]))

Ankit 2022-1-24

@Steven Lord thanks for your suggestion. now I know one more way to achieve this :)

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