Plotting double vs datetime (DD-MM-YY), only the year is used from the datetime

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Paul Barrette
Paul Barrette le 6 Nov 2023
Commenté : Paul Barrette le 13 Nov 2023
I am trying to plot datetime data (y axis) against double precision (x axis), but only the year is extracted from the datetime data. The two data files are attached.
Based on the matlab doc and six similar inquiries on this question, this should work, but there's evidently something I'm missing.
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Walter Roberson
Walter Roberson le 6 Nov 2023
Please be more specific about your plotting command. There are a fair number of different variables in the files.
Paul Barrette
Paul Barrette le 7 Nov 2023
Thanks and sorry - I should have provided more information. I'll spend some time understanding those files first.

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Peter Perkins
Peter Perkins le 10 Nov 2023
Paul, in addition to what Walter said, those mat files each contain a bunch of 23041xN variables. Likely you would benefit from storing all those in one timetable.

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Walter Roberson
Walter Roberson le 6 Nov 2023
Speculating about what you are plotting:
If you
plot(SNOW_GP,DATE)
then your y axis has about 40 years. In order for it to be meaningful to display month as part of the output, you would need to have at least 80 yticks -- unless, that is, you wanted to do something like mark every 2 1/2 years.
You can use code such as
ax = gcal
ax.YRuler.TickLabelFormat = 'uuuu-mm';
but unless you yticks to include some mid-year dates, it is not going to be useful to do so.
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Paul Barrette
Paul Barrette le 7 Nov 2023
Thank you for this, Walter. That does clarify the issue. I will spend more time on this.

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