To get every second month between Jan 2012 and Jan 2013. For instance, you can use tick_locations = datenum(2012,1) You might have to modify the tick_locations = datenum(2012,1) a bit to get the ticks that you want. % Call datetick again to get the right date labels, use option "keepticks"ĭatetick('mmm yyyy','keeplimits', 'keepticks') Sometimes, the dateticks are not spaced in any sensible way, then you can either try to zoom in and out a little until it snaps to something good, or you have to set the ticks manually: % Set ticks to first day of the months in 2010 It takes the same arguments as datetick, but it hooks into the zoom function and updates the ticks automatically. I have attached an excerpt of the file if you have bandwidth to suggest further help. I think perhaps the problem lies with the way the.
#Matlab serial date number to date string how to#
I am trying to figure out how to convert the serial dates to string dates, so I can plot the string dates on the graph, while cross-referencing the. The date and time vectors are the same length. I want to plot this data using the plot tools, and I want to cross reference 2 or 3 data points to the date. You can either call datetick('mmm yyyy','keeplimits')Īgain, after each zooming or panning, or you download datetickzoom from the Matlab file exchange. I imported an Excel document into Matlab, and my first column contains serial dates.
#Matlab serial date number to date string update#
The problem is, the ticks do not update after zooming in. You then plot your data using plot(numeric_date_vec, y)Īnd you let Matlab add the date-ticks automatically by calling datetick('mmm yyyy') You can convert this using numeric_date_vec = datenum(2009, 12, 31) + x However, the conversion is easy, since your format also counts the days, but you count after 31st of December, 2009. Also, this date actually never existed, making it really weird when you want to work with dates that are BC.
The numbers itself are a bit awkward, since they represent the "amount of time after, in days", which is a huge number.
The best format to use for plots is the "serial date format". Here is an example of a date and time expressed in the three MATLAB formats: Date String: '2 12:45:07' Date Vector: 2003 10 24 12 45 07 Serial Date Number: 7.3188e+005 A serial date number represents the whole and fractional number of days from to a specific date. The first step is to convert your date-format into one of the standard Matlab date formats.
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