6663b6c9
 adorian
projet complet av...
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#include "trigonometric_model.h"
#include "../../shared/poincare_helpers.h"
#include "../../poincare/include/poincare_layouts.h"
#include <math.h>
#include <poincare/preferences.h>
#include <assert.h>
using namespace Poincare;
using namespace Shared;
namespace Regression {
ExpressionLayout * TrigonometricModel::layout() {
static ExpressionLayout * layout = nullptr;
if (layout == nullptr) {
const ExpressionLayout * layoutChildren[] = {
new CharLayout('a', KDText::FontSize::Small),
new CharLayout(Ion::Charset::MiddleDot, KDText::FontSize::Small),
new CharLayout('s', KDText::FontSize::Small),
new CharLayout('i', KDText::FontSize::Small),
new CharLayout('n', KDText::FontSize::Small),
new CharLayout('(', KDText::FontSize::Small),
new CharLayout('b', KDText::FontSize::Small),
new CharLayout(Ion::Charset::MiddleDot, KDText::FontSize::Small),
new CharLayout('X', KDText::FontSize::Small),
new CharLayout('+', KDText::FontSize::Small),
new CharLayout('c', KDText::FontSize::Small),
new CharLayout(')', KDText::FontSize::Small),
new CharLayout('+', KDText::FontSize::Small),
new CharLayout('d', KDText::FontSize::Small)
};
layout = new HorizontalLayout(layoutChildren, 14, false);
}
return layout;
}
Expression * TrigonometricModel::simplifiedExpression(double * modelCoefficients, Poincare::Context * context) {
double a = modelCoefficients[0];
double b = modelCoefficients[1];
double c = modelCoefficients[2];
double d = modelCoefficients[3];
Expression * aExpression = new Decimal(a);
Expression * sinExpression = new Sine(
new Addition(
new Multiplication(
new Decimal(b),
new Symbol('x'),
false),
new Decimal(c),
false),
false);
Expression * asinExpression = new Multiplication(aExpression, sinExpression, false);
Expression * dExpression = new Decimal(d);
Expression * result = new Addition(asinExpression, dExpression, false);
PoincareHelpers::Simplify(&result, *context);
return result;
}
double TrigonometricModel::evaluate(double * modelCoefficients, double x) const {
double a = modelCoefficients[0];
double b = modelCoefficients[1];
double c = modelCoefficients[2];
double d = modelCoefficients[3];
double radianX = Poincare::Preferences::sharedPreferences()->angleUnit() == Poincare::Expression::AngleUnit::Radian ? x : x * M_PI/180.0;
return a*sin(b*radianX+c)+d;
}
double TrigonometricModel::partialDerivate(double * modelCoefficients, int derivateCoefficientIndex, double x) const {
double a = modelCoefficients[0];
double b = modelCoefficients[1];
double c = modelCoefficients[2];
double radianX = Poincare::Preferences::sharedPreferences()->angleUnit() == Poincare::Expression::AngleUnit::Radian ? x : x * M_PI/180.0;
if (derivateCoefficientIndex == 0) {
// Derivate: sin(b*x+c)
return sin(b*radianX+c);
}
if (derivateCoefficientIndex == 1) {
// Derivate: x*a*cos(b*x+c);
return radianX*a*cos(b*radianX+c);
}
if (derivateCoefficientIndex == 2) {
// Derivate: a*cos(b*x+c)
return a*cos(b*radianX+c);
}
if (derivateCoefficientIndex == 3) {
// Derivate: 1
return 1.0;
}
assert(false);
return 0.0;
}
}
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