Plotting data with timestamps
26 views (last 30 days)
Show older comments
Hi,
I have some data from a sensor and corresponding timestamps. How do I plot this data? (x axis - timestamps, y-axis - data) plot function gives empty figures. Probably because timestamps cannot be put in a linear scale. I tried semilogx - this also gives empty figures.
How do I do this?
Thanks in advance
2 Comments
Accepted Answer
dpb
on 28 Nov 2016
Edited: dpb
on 28 Nov 2016
Convert from whatever format the timestamps are in to a Matlab representation of dates...with R2014 up, there's the datetime class; prior to that use datenum. See <datetime> for current versions; plot is datetime -aware.
7 Comments
Peter Perkins
on 31 Oct 2018
In recent versions of MATLAB, you can also convert directly from ms since 1970:
>> datetime(1489337264031,'ConvertFrom','EpochTime','TicksPerSecond',1000,'Format','dd-MMM-yyyy HH:mm:ss.SSS')
ans =
datetime
12-Mar-2017 16:47:44.031
The 'Epoch' parameter defaults to 1-Jan-1970, which is convenient if you have posix timestamps.
More Answers (0)
See Also
Categories
Find more on Calendar in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!