double x1[3] = {-1.5, 0, 1.5};
double y1[3] = {0, 0, 0};
double x2[3] = {0, 0, 0};
double y2[3] = {-1.5, 0, 1.5};
x_1_line->setSamples(x1,y1,3);
y_1_line->setSamples(x2,y2,3);
x_1_line
->setPen
(QPen(QColor(Qt
::black),
1,Qt
::DashLine));
y_1_line
->setPen
(QPen(QColor(Qt
::black),
1,Qt
::DashLine));
x_1_line->attach(ui_plot);
y_1_line->attach(ui_plot);
ui_plot->replot();
double x1[3] = {-1.5, 0, 1.5};
double y1[3] = {0, 0, 0};
double x2[3] = {0, 0, 0};
double y2[3] = {-1.5, 0, 1.5};
x_1_line->setSamples(x1,y1,3);
y_1_line->setSamples(x2,y2,3);
x_1_line->setPen(QPen(QColor(Qt::black),1,Qt::DashLine));
y_1_line->setPen(QPen(QColor(Qt::black),1,Qt::DashLine));
x_1_line->attach(ui_plot);
y_1_line->attach(ui_plot);
ui_plot->replot();
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