MATLAB: Does MATLAB Coder support DATEVEC, DATENUM, DATESTR, DATETIME, and other date-related functions

matlab codertictoc

Does MATLAB Coder support DATEVEC, DATENUM, DATESTR, DATETIME, and other date-related functions?

Best Answer

At this time, support for date-related functions is not available in MATLAB Coder.

The limitation on date related functions is due to the variety of ways different operating systems and deployment targets handle system time. For many embedded targets, there is no such concept of a "system time" like there is with desktop operating systems.

Calculating system time may possible, depending on the platform, by calling external C code from within the MATLAB code. Please refer to the following link:

<https://www.mathworks.com/matlabcentral/answers/95744-how-can-i-calculate-the-system-time-using-custom-code-in-matlab-coder-2-0-r2011a>

Related Solutions

MATLAB: Datestr, add non-interpreted characters into format

data = {'2011-01-04_16h50m20s'
        '2010-11-30_07h00m02s'}
date2 = cellfun(@(x)[x{:}],regexp(data,'[-_hms]','split'),'un',0);
[ign,ind] = sort(datenum(date2,'yyyymmddHHMMSS'));
out = data(ind)

EDIT

[ign,ind] = sort(datenum(regexprep(data,'[-_hms]',''),'yyyymmddHHMMSS'));
out = data(ind)

MATLAB: How to use retime to convert to monthly time frequency, and display the data for end of month dates

The "retime" function (used with timetables) operates differently than the "tomonthly" function used with TimeSeries data, as it displays the new monthly frequency table with start-of-month datetimes rather than end-of-month datetimes.

The trick is to use the following version of retime:

TT2 = retime(TT1,newTimes,method)

and pass in the end of month date times as the variable "newTimes".

Attached is a script ("test_script.m") which demos how to create a time-series time table and how to convert them to monthly time-series and timetable respectively and the differences between the two.

The "retime" function is extensive and can be used for a variety of functions that were used to manipulate TimeSeries objects. The documentation for "retime" can be found here:

https://www.mathworks.com/help/matlab/ref/timetable.retime.html

The general workflow for converting code that uses time series over to timetables can be found here:

https://www.mathworks.com/help/finance/convert-from-fints-to-timetables.html

You might have to use additional functions that operate on "datetime" arrays to get to the final result (Eg - "eomdate" in attached code).

A full list of functions that operate on "datetime" arrays can be found here:

https://www.mathworks.com/help/matlab/date-and-time-operations.html

Best Answer

Related Solutions

MATLAB: Datestr, add non-interpreted characters into format

MATLAB: How to use retime to convert to monthly time frequency, and display the data for end of month dates

Related Question