Combine year and day into single date vector to plot against measurements

I have a data set that looks like:

1991 46.000000 -5.08

1991 46.006944 -5.08

1991 46.013889 -5.09

1991 46.020833 -5.09

1991 46.027778 -5.09

1991 46.034722 -5.09

In the format of: year, days since Jan 1 of that year, and a measurement. The whole data set spans several years.

How can I combine both the year and number of days into a date string (or serial date number) that I can continuously plot against the measurements?

Thanks for any help.

[the cyclist]

How are those data stored now? Are they just in a numeric array?

Can you upload the data here (using the paper clip icon), so that we don't have to recreate it?

Are you ok with the output being in a datetime object? That is arguably the best way to store dates in recent versions of MATLAB.

Answer 1

[Walter Roberson]

x = datetime(Data(:,1),1,1) + days(Data(:,2));
plot(x, Data(:,3))

[Brenton Hirao]

Thank you!