Mercurial > octave-dspies
annotate examples/oregonator.cc @ 19010:3fb030666878 draft default tip dspies
Added special-case logical-indexing function
* logical-index.h (New file) : Logical-indexing function. May be called on
octave_value types via call_bool_index
* nz-iterators.h : Add base-class nz_iterator for iterator types. Array has
template bool for whether to internally store row-col or compute on the fly
Add skip_ahead method which skips forward to the next nonzero after its
argument
Add flat_index for computing octave_idx_type index of current position (with
assertion failure in the case of overflow)
Move is_zero to separate file
* ov-base-diag.cc, ov-base-mat.cc, ov-base-sparse.cc, ov-perm.cc
(do_index_op): Add call to call_bool_index in logical-index.h
* Array.h : Move forward-declaration for array_iterator to separate header file
* dim-vector.cc (dim_max): Refers to idx-bounds.h (max_idx)
* array-iter-decl.h (New file): Header file for forward declaration of
array-iterator
* direction.h : Add constants fdirc and bdirc to avoid having to reconstruct
them
* dv-utils.h, dv-utils.cc (New files) :
Utility functions for querying and constructing dim-vectors
* idx-bounds.h (New file) :
Utility constants and functions for determining whether things will overflow
the maximum allowed bounds
* interp-idx.h (New function : to_flat_idx) : Converts row-col pair to linear
index of octave_idx_type
* is-zero.h (New file) : Function for determining whether an element is zero
* logical-index.tst : Add tests for correct return-value dimensions and large
sparse matrix behavior
author | David Spies <dnspies@gmail.com> |
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date | Fri, 25 Jul 2014 13:39:31 -0600 |
parents | 224e76250443 |
children |
rev | line source |
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2689 | 1 #include <octave/oct.h> |
2 | |
3 DEFUN_DLD (oregonator, args, , | |
17791
224e76250443
Use GNU style coding conventions for code in examples/
Rik <rik@octave.org>
parents:
9053
diff
changeset
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4 "The `oregonator'.\n\ |
3162 | 5 \n\ |
6 Reference:\n\ | |
7 \n\ | |
8 Oscillations in chemical systems. IV. Limit cycle behavior in a\n\ | |
9 model of a real chemical reaction. Richard J. Field and Richard\n\ | |
10 M. Noyes, The Journal of Chemical Physics, Volume 60 Number 5,\n\ | |
11 March 1974.") | |
2689 | 12 { |
13 ColumnVector dx (3); | |
14 | |
3681 | 15 ColumnVector x (args(0).vector_value ()); |
2689 | 16 |
4205 | 17 dx(0) = 77.27 * (x(1) - x(0)*x(1) + x(0) - 8.375e-06*pow (x(0), 2.0)); |
2689 | 18 dx(1) = (x(2) - x(0)*x(1) - x(1)) / 77.27; |
19 dx(2) = 0.161*(x(0) - x(2)); | |
20 | |
21 return octave_value (dx); | |
22 } |