chosen time (MP enters)
1/25, 9:00
1/25, 10:00
1/25, 10:30

1/30, 09:30
1/30, 10:00
1/30, 10:30
1/30, 11:00





2/1, 9:00
2/1, 9:30
2/5, 2:00








































































































































































































































































































































































































































































































































































































































































































































































































































































































































































[tt,uu]=meshgrid(0:.1:2,0:.1:2);
du = tt.*uu+sin(tt);
dt=ones(size(du));
quiver(tt,uu,dt,du)













