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/* -*-ePiX-*- */
#include "epix.h"
using namespace ePiX;
double MAX(2*M_PI);
double f(double t)
{
return t*Sin(t);
}
int main()
{
picture(P(-MAX,-MAX), P(MAX,MAX), "240x240pt");
begin();
// Coordinate axes and labels
pen(Black(0.3));
grid(8,8);
font_size("scriptsize");
// trigonometric axis labels
bottom_axis(4, P(0,-4)).trig().draw_labels();
left_axis(4, P(-4,0)).trig().draw_labels();
legend L;
L.item_border(0).border(Red(), 0.4);
bold(Black());
plot(f, xmin(), xmax(), 90);
L.path_item("$y=x\\sin x$");
pen(Green());
plot(Deriv(f), xmin(), xmax(), 90);
L.path_item("$y=\\frac{d}{dx}(x\\sin x)$");
pen(Blue());
plot(Integral(f, 0), xmin(), xmax(), 90); // definite integral from 0
L.path_item("$y=\\int_0^x t\\sin t\\,dt$");
L.draw(P(0,2*M_PI), P(2,-2), br);
end();
}
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