How can I display the date on a plot?

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Agustin 2017-9-13

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评论： Agustin 2017-9-14

Hi! I'm working on a plot to show the displacements of a point at different times and I got the following:

I got the results I wanted on the plot but instead of showing the time in julian time, I want to show the date. I tried converting the time vector using the datestr command but it says that there is a subscript mismatch. Can someone help me with this? Thank you.

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Answer 1

Walter Roberson 2017-9-13

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If you have roughly R2015b or later (I would need to recheck the exact release) then where you have roughly

plot(Time, Displacement)

change that to

TimeDT = datetime(Time, 'ConvertFrom', 'juliandate', 'Format', 'yyyy-MM-dd');   %or as appropriate for format you want displayed
plot(TimeDT, Displacement)

The ability to use datetime objects as the "x" values did not start with R2014b with the rest of the Handle Graphics 2 (HG2) graphics system, so if you are in the R2014b to R2015b range possibly it was not yet available.

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Walter Roberson 2017-9-14

You wrote, "instead of showing the time in julian time", so I took your word that what you have is indeed julian dates. However your values are instead consistent with datenum instead of julian dates. So in the code I posted replace 'juliandate' with 'datenum'

Agustin 2017-9-14