- You can use datetick() to format your x axis ticks to date or time values
- You can define your x-values as datetime() and the plot command automatically formats your x-axis with dateticks
plot Datetime on x Axes
29 次查看(过去 30 天)
显示 更早的评论
Hello! I have a endless while loop, that generates every 20 min a number. I'm trying to figure out how to plot the data with the dates on the x axis and numbers on the Y.
how can i plot the date and time on x axes?
I'm pretty new to Matlab, would really appreciate any help!
0 个评论
采纳的回答
Benjamin Großmann
2020-3-9
There are mainly 2 possibilities
For a mwe, we can assume that we start "now" and are collecting data for 12 hours resutling in a time vector t
t = datetime('now'):minutes(20):datetime('now')+hours(12);
y = rand(size(t));
plot(t, y)
You can also append t with the current time
t = []; % initialization
% ...
% ...
% ...
% every iteration / callback
t(end+1) = datetime('now');
As you are new to matlab, i would also recommend not to use a "endless while loop, that generates every 20 min a number". Have a look at the timer class. With the timer class you can define an instance of the timer which calls a function (schedules) every 20 minutes "in the background". Please let me know if you need help with that.
5 个评论
Benjamin Großmann
2020-3-9
You can set the timer interval via the period property of the timer class. See line 9 in my first code snippet.
First, write a function and put everything inside the function which should be evaluated with the specified rate. This is going to be your timerFcn. Please note that a timer fcn (and other callbacks) must have an input argument for the source and event. You can add additional arguments and pass values to those callbacks like i did with the myCloseRequestFcn().
If you want to store data, you can use the UserData of the timer class as I did with the x data, y data and so on.
Then you just have to adapt the definition of the timer instance from my first code snippet.
If you can post a mwe of your problem, than I can try my best to support you with the timer function.
Noah Prisament
2023-7-19
The "animatedline" now supports datetimes and durations for all axes as of R2023a!
So, you no longer need to convert your datetimes into a "datevec" which should give your plots a nicer looks with better axes ticks. In order to plot your data on an "animatedline" you can now utilize the following example:
h = animatedline(NaT, NaN);
addpoints(h, Xdata, Ydata);
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Dates and Time 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!