1. Move FunctionSample to its own .h/.cc files.
2. Migrate LineSearchFunction::Evaluate to use FunctionSample
for input and output.
Change-Id: I8bfb97e1900d95a4686c9621dda5b584458b45c0
Since Ceres is moving to using GitHub for issues, and the Google
Code URL in the current copyright header will soon become invalid,
update all the headers.
Change-Id: I1fce70375d1bcf098591f07b4d8f01a5c1e0789c
For historical reasons we had a "using namespace std;" in port.h. This
is generally a bad idea. So removing it and along the way doing a bunch
of cpplint cleanup.
Change-Id: Ia125601a55ae62695e247fb0250df4c6f86c46c6
- Increase precision of numeric values output in error messages to
allow for easier debugging.
- Ensure termination after Wolfe search bracketing phase if bracket
width has been shrunk to below tolerance.
- Cleaned up return value for BracketingPhase(), now false iff
optimisation should stop, true otherwise.
- Fix bug whereby we would mark a step size as satisfying the Wolfe
conditions when it did not due to numerical issues in the cost
function.
- Adding explanation of a subtlety in which a zoom could still be
acceptably invoked with bracket_low.f > bracket_high.f.
- Replacing hard check of a pre-condition of ZoomPhase() with a
conditional return if not satisfied to address issue whereby a
bracket could be incorrectly identified due to inconsistent values
& gradients returned from the cost function.
- Adding missing check for step size validity in line search minimizer.
- Adding ToDebugString() for FunctionSample.
Change-Id: Iad98e635749877f80c079ebad126bf022d82232d
1. polynomial_solver* -> polynomial*.
2. Added support for differentiating polynomials.
2. Added support for interpolating polynomials from function
values and gradients.
3. Added support for minimizing polynomials by solving
for the roots of their derivatives in an interval.
4. Added support for finding the minimum of a polynomial
that interpolates function values and gradients in
an interval.
Change-Id: Id7e6764ad4db09c3edd60f1378c7f50f20dd08dc
Sameer Agarwal