Code Generation for Duration Arrays
The values in a duration array represent elapsed times in units of fixed length, such as hours, minutes, and seconds. You can create elapsed times in terms of fixed-length (24-hour) days and fixed-length (365.2425-day) years.
You can add, subtract, sort, compare, concatenate, and plot duration arrays.
When you use duration arrays with code generation, adhere to these restrictions.
Define Duration Arrays for Code Generation
For code generation, use the
duration function to create duration arrays.
For example, suppose the input arguments to your MATLAB® function are three numeric arrays of arbitrary size whose elements specify
lengths of time as hours, minutes, and seconds. You can create a duration array from these
three input arrays.
function d = foo(h,m,s) %#codegen d = duration(h,m,s); end
You can use the
milliseconds functions to create duration arrays in units of years, days,
hours, minutes, or seconds. For example, you can create an array of hours from an input
function d = foo(h) %#codegen d = hours(h); end
Allowed Operations on Duration Arrays
For code generation, you are restricted to the operations on duration arrays listed in this table.
d = duration(1:3,0,0); d(1) = hours(5);
Code generation does not support using the assignment operator
d = duration(1:3,0,0); tf = d(1) < d(2);
Code generation supports relational operators.
d = duration(1:3,0,0); idx = [1 2]; d(idx); idx = logical([1 1 0]); d(idx);
Code generation supports indexing by position, linear indexing, and logical indexing.
d1 = duration(1:3,0,0); d2 = duration(4,30,0); d = [d1 d2];
Code generation supports concatenation of duration arrays.
MATLAB Toolbox Functions That Support Duration Arrays
For code generation, you can use duration arrays with these MATLAB toolbox functions: