Plotting data with timestamps
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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
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dpb
2016년 11월 28일
편집: dpb
2016년 11월 28일
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.
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Peter Perkins
2018년 10월 31일
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.
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