Function traj is 1D analogue of vect. It draw vectors from specified points.
MGL code:
call 'prepare1d' subplot 1 1 0 '':title 'Traj plot':box:plot x1 y:traj x1 y y1 y2
C++ code:
void smgl_traj(mglGraph *gr) { mglData x,y,y1,y2; mgls_prepare1d(&y,&y1,&y2,&x); if(big!=3) {gr->SubPlot(1,1,0,""); gr->Title("Traj plot");} gr->Box(); gr->Plot(x,y); gr->Traj(x,y,y1,y2); }