Adding a function get_string to the argument object.

Adding more functionalities to the Ipopt fitter

sources/core/args.h

@@ -130,6 +130,18 @@ class arguments
                 //std::cerr << "Underfined request to key : \"" << key << "\"" << std::endl ;
 				return std::string() ;
 			}
+        }
+		//! \brief acces to the string value associated with the parameter
+		//! \a key.
+		//!
+		//! The \a default_value argument will be returned if the \a key
+		//! has no associated value.
+		std::string get_string(const std::string& key, std::string default_value = "") const
+		{
+			if(_map.count(key) > 0)
+				return _map.find(key)->second.c_str() ;
+			else
+				return default_value ;
 		}
 		//! \brief acces to the float value associated with the parameter
 		//! \a key.

sources/plugins/nonlinear_fitter_ipopt/fitter.cpp

@@ -265,9 +265,15 @@ bool nonlinear_fitter_ipopt::fit_data(const data* d, function* fit, const argume
 
 	// Static parameters for the Solver
 	app->Options()->SetStringValue("hessian_approximation", "limited-memory");
+#ifdef DEBUG
+	app->Options()->SetIntegerValue("print_level", 5);
+#else
+	app->Options()->SetIntegerValue("print_level", 0);
+#endif
 
 	// Solver's options
 	app->Options()->SetIntegerValue("max_iter", args.get_int("ipopt-max-iter", 10));
+	app->Options()->SetStringValue("linear_solver", args.get_string("ipopt-solver", "mumps"));
 	
 
 	// Solves the NL problem

sources/plugins/nonlinear_fitter_ipopt/fitter.h

@@ -28,11 +28,21 @@
  *
  *  <pre>
  *  INCLUDEPATH += [path-to-ipopt-include]
- *  LIBS += -L[path-to-ipopt-lib] -lipopt
+ *  LIBS += -L[path-to-ipopt-lib] -lipopt -lipoptamplinterface 
+ *  -lcoinmumps -lcoinmetis -lcoinlapack -lcoinblas -lcoinasl 
  *  </pre>
  *
  *
  *  <h3>Plugin parameters</h3>
+ *  <ul>
+ *		<li><b>--ipopt-max-iter</b> <em>[int]</em> to control the number
+ *		of iterations the non linear solver will take before returning a 
+ *		solution. <em>Note that this solution might incorrect.</em></li>
+ *		<li><b>--ceres-solverr</b> <em>[string]</em> to control the type 
+ *		linear solver that will be used during matrix operations. See
+ *		<a href="http://www.coin-or.org/Ipopt/documentation/node50.html">
+ *		here</a> for the list of possible choices.</li>
+ *  </ul>
  *
  */
 class nonlinear_fitter_ipopt: public fitter

sources/tests/unitary-blinn.py

+import math
+
+f = open('unitary-blinn.data', 'w+')
+
+# Generate the header of the file in the ALTA format
+f.write("#DIM 1 1\n")
+f.write("#PARAM_IN COS_TH\n")
+f.write("#PARAM_OUT INV_STERADIAN\n")
+
+def blinn(cost, sigma):
+	return math.pow(cost, sigma);
+#endif
+
+for i in range(0,99):
+	theta = i * 0.01
+
+	val = blinn(theta, 10);
+
+	f.write(str(theta) + "\t" + str(val) + "\n");
+#end