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Octave’s cell type is also available from within oct-files. A cell array is
just an Array
of octave_value
s, and thus each element of the cell
array can be treated like any other octave_value
. A simple example is
#include <octave/oct.h> #include <octave/Cell.h> DEFUN_DLD (celldemo, args, , "Cell Demo") { if (args.length () != 1) print_usage (); Cell c = args(0).cell_value (); octave_value_list retval; retval.resize (c.numel ()); // faster code by pre-declaring size for (octave_idx_type i = 0; i < c.numel (); i++) { retval(i) = c(i); // using operator syntax //retval(i) = c.elem (i); // using method syntax } return retval; }
Note that cell arrays are used less often in standard oct-files and so the
Cell.h header file must be explicitly included. The rest of the example
extracts the octave_value
s one by one from the cell array and returns
them as individual output arguments. For example:
[b1, b2, b3] = celldemo ({1, [1, 2], "test"}) ⇒ b1 = 1 b2 = 1 2 b3 = test