MATLAB Answers

Function 'daysact' not supported for code generation.

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Muhammad Usman
Muhammad Usman on 14 Jan 2021
Answered: Walter Roberson on 14 Jan 2021
I am using this simple code inside a user defined Matlab function in SIMULINK
NumDays = daysact('20-March','21-March');
But it shows error that "Function 'daysact' not supported for code generation."

Answers (2)

Sean de Wolski
Sean de Wolski on 14 Jan 2021
You should use the newer and recommended datetime / duration classes which support c-codegen:
d = days(datetime(t1)-datetime(t2));

Walter Roberson
Walter Roberson on 14 Jan 2021
Correct. That function cannot be compiled.
The work-around is to use datetime and subtract.
dt1 = datetime('7-sep-2002','Locale','en_US')
dt1 = datetime
07-Sep-2002
dt2 = datetime('25-dec-2002','Locale','en_US')
dt2 = datetime
25-Dec-2002
NumDays = daysact(dt1, dt2) %what you cannot generate code for
NumDays = 109
NumDays2 = days(dt2-dt1) %replacement function
NumDays2 = 109

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