How to create a date starting from a specific date and time line for x axis

I have a data set for temperature staring from 2/6/2021 7:12 a.m .

I need to create a x axis with a date starting from 2/6/2021 7:12 a.m to 2/7/2021 1:31 pm. with one minute changes. size of the date line should be 1100

this x axis only need to show the time

and then I need to plot this x axis aginst my temperature labeling with 6 hour intervals.

Answer 1

[Samayochita]

Hi Dushan,

I see that you are trying to create a time-based x-axis starting from a specific date and time (like 2/6/2021 7:12 AM), having one-minute intervals. I suggest you try to implement the following:

• First, create a time range that spans from 2/6/2021 7:12 AM to 2/7/2021 1:31 PM with 1-minute intervals. You can use MATLAB’s “datetime” (https://www.mathworks.com/help/matlab/ref/datetime.html) function.
• Next, format the x-axis to show only the time part, not the full date.
• For labeling, you can choose every 6 hours on the x-axis. Use “xticks” (https://www.mathworks.com/help/matlab/ref/xticks.html) and “xticklabels” (https://www.mathworks.com/help/matlab/ref/xticklabels.html) to define custom ticks and labels for the x-axis.

Below is an example code I wrote for your reference:

% Define start and end date:
startDate = datetime(2021, 2, 6, 7, 12, 0);   
endDate = datetime(2021, 2, 7, 13, 31, 0);   
% Create a date range with 1-minute intervals
timeRange = startDate:minutes(1):endDate;
% Format the X-axis to show time only (without the full date)
datetick('x', 'HH:MM', 'keeplimits');
% Label the X-axis with 6-hour intervals
xticks(startDate:hours(6):endDate);   
xticklabels(datestr(startDate:hours(6):endDate, 'HH:MM'));  

Hope this helps!