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#include <coefficientPlotter.h>
#include <qwt_plot_curve.h>
#include <qwt_plot_marker.h>
#include <qwt_plot_zoomer.h>
#include <qwt_plot_panner.h>
#include <QColor>
#include <BALL/QSAR/regressionModel.h>
using namespace BALL::QSAR;
namespace BALL
{
namespace VIEW
{
CoefficientPlotter::CoefficientPlotter(ModelItem* model_item)
: Plotter(model_item)
{
model_item_ = model_item;
qwt_plot_->enableAxis(QwtPlot::yLeft);
qwt_plot_->enableAxis(QwtPlot::yRight,0);
plot(1);
zoomer_ = new QwtPlotZoomer(qwt_plot_->canvas(),this);
setWindowTitle("Coefficient Plotter");
RegressionModel* model = (RegressionModel*)model_item_->model();
int no_y = model->getTrainingResult()->cols();
if(no_y>1)
{
activity_combobox_->addItem("All activities",-1);
for(unsigned int i=0; i<no_y;i++)
{
String s = "Activity "+String(i);
activity_combobox_->addItem(s.c_str(),i);
}
activity_combobox_->show();
}
}
void CoefficientPlotter::plot(bool zoom)
{
qwt_plot_->clear();
RegressionModel* model = (RegressionModel*)model_item_->model();
const Eigen::MatrixXd* coefficient_matrix = model->getTrainingResult();
if(coefficient_matrix->cols()==0)
{
std::cout << "Model must be trained before coefficients can be plotted!" << std::endl;
return;
}
const vector<string>* feature_names;
if(!model_item_->getRegistryEntry()->kernel)
{
feature_names = model->getDescriptorNames();
}
else
{
feature_names = model->getSubstanceNames();
}
bool show_stddev=0;
const Eigen::MatrixXd* coeff_stddev = model->validation->getCoefficientStdErrors();
if(coeff_stddev!=NULL && coeff_stddev->rows()==coefficient_matrix->rows() && coeff_stddev->cols()==coefficient_matrix->cols())
{
show_stddev=1;
}
double min_y=1e10;
double max_y=-1e10;
double min_x=1;
double max_x=coefficient_matrix->rows();
const unsigned int size = coefficient_matrix->rows();
int start_matrixindex = selected_activity_+1;
int end_matrixindex = selected_activity_+1;
if(selected_activity_<0) // plot coefficients for all activities at once
{
start_matrixindex = 1;
end_matrixindex = coefficient_matrix->cols();
}
for(int i=start_matrixindex; i<=end_matrixindex; i++)
{
QwtPlotCurve* curve_i = new QwtPlotCurve;
double* x = new double[size];
double* y = new double[size];
for(unsigned int j=1; j<=size; j++)
{
QwtPlotMarker* marker= new QwtPlotMarker;
marker->setSymbol(data_symbol);
double coefficient_j = (*coefficient_matrix)(j,i);
x[j-1] = j;
y[j-1] = coefficient_j;
if(coefficient_j<min_y) min_y=coefficient_j;
if(coefficient_j>max_y) max_y=coefficient_j;
marker->setValue(j,coefficient_j);
marker->attach(qwt_plot_); // attached object will be automatically deleted by QwtPlot
if(show_data_labels)
{
QString s =(*feature_names)[j-1].c_str();
QwtText label(s);
label.setFont(data_label_font);
marker->setLabel(label);
marker->setLabelAlignment(data_label_alignment);
}
if(show_stddev)
{
double* sx = new double[2];
double* sy = new double[2];
double stddev = (*coeff_stddev)(j,i);
sx[0]=j; sx[1]=j;
sy[0]=coefficient_j-stddev; sy[1]=coefficient_j+stddev;
QwtPlotCurve* error_bar = new QwtPlotCurve;
error_bar->setData(sx,sy,2);
QColor c(135,135,135); // grey
QPen pen(c);
error_bar->setPen(pen);
error_bar->attach(qwt_plot_);
delete [] sx; delete [] sy;
}
}
curve_i->setData(x,y,size);
delete [] x;
delete [] y;
QColor c(135,135,135);
if(i==1)
{
c = QColor(190,10,10); // red
}
else if(i==2)
{
c = QColor(10,30,195); // blue
}
else if(i==3)
{
c = QColor(194,195,7); // yellow
}
else
{
c = QColor(rand()%255,rand()%255,rand()%255); // random color
}
QPen pen(c);
curve_i->setPen(pen);
curve_i->attach(qwt_plot_); // attached object will be automatically deleted by QwtPlot
}
QString s1 = "features";
QString s2 = "coefficient values";
qwt_plot_->setAxisTitle(0,s2);
qwt_plot_->setAxisTitle(2,s1);
double x_border=(max_x-min_x)*0.05;
double y_border=(max_y-min_y)*0.05;
min_x-=x_border; min_y-=y_border;
max_x+=x_border; max_y+=y_border;
QwtPlotCurve* zero_line = new QwtPlotCurve;
double x[2]; x[0]=min_x; x[1]=max_x;
double y[2]; y[0]=0; y[1]=0;
zero_line->setData(x,y,2);
QColor c(135,135,135); // grey
QPen pen(c);
zero_line->setPen(pen);
zero_line->attach(qwt_plot_);
if(zoom)
{
qwt_plot_->setAxisScale(QwtPlot::yLeft,min_y,max_y);
qwt_plot_->setAxisScale(QwtPlot::xBottom,min_x,max_x);
}
}
}
}
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