reintegration of LatCore & folder restructuration

lib/Functional/TabFunction.hpp

@@ -0,0 +1,69 @@
+/*
+ * TabFunction.hpp, part of LatAnalyze 3
+ *
+ * Copyright (C) 2013 - 2016 Antonin Portelli
+ *
+ * LatAnalyze 3 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LatAnalyze 3 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LatAnalyze 3.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef Latan_TabFunction_hpp_
+#define Latan_TabFunction_hpp_
+
+#include <LatAnalyze/Global.hpp>
+#include <LatAnalyze/Functional/Function.hpp>
+#include <LatAnalyze/Core/Math.hpp>
+#include <LatAnalyze/Statistics/XYStatData.hpp>
+
+BEGIN_LATAN_NAMESPACE
+
+/******************************************************************************
+ *                      tabulated function: 1D only                           *
+ ******************************************************************************/
+
+enum class InterpType
+{
+  NEAREST,
+  LINEAR,
+  QUADRATIC
+};
+
+class TabFunction: public DoubleFunctionFactory
+{
+public:
+    // constructors
+    TabFunction(void) = default;
+    TabFunction(const DVec &x, const DVec &y,
+                const InterpType interpType = InterpType::LINEAR);
+    // destructor
+    virtual ~TabFunction(void) = default;
+    // access
+    void setData(const DVec &x, const DVec &y);
+    void setInterpolationType(const InterpType interpType);
+    // function call
+    double operator()(const double *arg) const;
+    // factory
+    virtual DoubleFunction makeFunction(const bool makeHardCopy = true) const;
+private:
+    std::map<double, double>::const_iterator nearest(const double x) const;
+
+    std::map<double, double> value_;
+    InterpType interpType_;
+};
+
+DoubleFunction interpolate(const DVec &x, const DVec &y,
+                           const InterpType interpType = InterpType::LINEAR);
+
+END_LATAN_NAMESPACE
+
+#endif // Latan_TabFunction_hpp_