Bård Skaflestad
6ed2b129cb
Implement constant() and variable() in terms of function()
...
Specifically,
- A constant is a function with zero derivative
- A variable is a function with unit derivative with respect to
itself.
2013-04-30 13:41:13 +02:00
Bård Skaflestad
134b9b1a7f
Readjust whitespace to original conventions.
2013-04-30 11:52:03 +02:00
Atgeirr Flø Rasmussen
0bf693e8c0
Merge remote-tracking branch 'bska/master'
2013-04-30 11:07:13 +02:00
Atgeirr Flø Rasmussen
42cdfa27a0
Use named constructor pattern.
...
Made AutoDiff::Forward constructor private.
Added static methods constant(), variable(x) and function(x, dx).
2013-04-30 11:05:59 +02:00
Bård Skaflestad
6319c428a3
Don't return values from update operators.
...
Statements like
a = b += c
make no sense
2013-04-30 10:47:00 +02:00
Bård Skaflestad
0ff3b721ee
Rename members to better reflect purpose.
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Specifically,
- x_ -> val_
- dx_ -> der_
2013-04-30 09:25:37 +02:00
Bård Skaflestad
011ab5ee93
Operator *=(): Use correct derivative chain rule
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Updating the derivative using '*=' is just plain wrong.
2013-04-29 23:53:31 +02:00
Bård Skaflestad
72d6d32095
Don't use updated values for computing derivatives
...
We must not overwrite the current evaluation point until all the
derivative values have been calculated. Otherwise, the derivatives
will differ from that of the actual values.
2013-04-29 23:28:49 +02:00
Bård Skaflestad
8105166c26
Fix misprint in Forward/Scalar case.
2013-04-29 14:51:28 +02:00
Bård Skaflestad
b05f65ae70
Add simple library for automatic differentiation
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No build system or automatic test cases at this point.
2013-04-29 13:39:57 +02:00
