first root finder class implementation

examples/Makefile.am

@@ -22,7 +22,8 @@ noinst_PROGRAMS =           \
     exMathInterpreter       \
     exMin                   \
     exPlot                  \
-    exRand
+    exRand                  \
+    exRootFinder
 
 exCompiledDoubleFunction_SOURCES = exCompiledDoubleFunction.cpp
 exCompiledDoubleFunction_CFLAGS  = -g -O2
@@ -56,4 +57,8 @@ exRand_SOURCES                   = exRand.cpp
 exRand_CFLAGS                    = -g -O2
 exRand_LDFLAGS                   = -L../lib/.libs -lLatAnalyze
 
+exRootFinder_SOURCES             = exRootFinder.cpp
+exRootFinder_CFLAGS              = -g -O2
+exRootFinder_LDFLAGS             = -L../lib/.libs -lLatAnalyze
+
 ACLOCAL_AMFLAGS = -I .buildutils/m4

examples/exRootFinder.cpp

@@ -0,0 +1,24 @@
+#include <iostream>
+#include <LatAnalyze/Function.hpp>
+#include <LatAnalyze/GslHybridRootFinder.hpp>
+
+using namespace std;
+using namespace Latan;
+
+int main(void)
+{
+    constexpr double a = 1., b = 10.;
+    DoubleFunction f1(2, [a](const double *x){return a*(1.-x[0]);});
+    DoubleFunction f2(2, [b](const double *x){return b*(x[1]-x[0]*x[0]);});
+    vector<DoubleFunction *> system = {&f1, &f2};
+    GslHybridRootFinder solve;
+    DVec init(2), x;
+    
+    solve.setVerbosity(Solver::Verbosity::Debug);
+    init(0) = -10.; init(1) = -5.;
+    solve.setInit(init);
+    x = solve(system);
+    cout << "solution: " << x.transpose() << endl;
+    
+    return 0;
+}