Hello.

I've just installed Maple 2015 and when I started it, this happened

It seemed that something was wrong with the graphics or java. But I really don't know what to do next.

Please help me, thank you.

Hi everyone, I'm working a problem

Given a dog and a man. At t=0, the position of the man and his dog is (0,0) and (0,h), respectively. Then, the man start moving along Ox with constant speed vm. The dog keep running toward its master with constant speed vd. Describe the movement of the dog?

Therefore, let say the position of the dog is (f1(x),f2(x)), I wrote these:

restart;

with(plots);

MD := proc (h, vm, vd) local x, y, ode, ics, sol;

ode := {(diff(f2(t), t))*(vm*t-f1(t))+(diff(f1(t), t))*f2(t), diff(f2(t), t) = -sqrt(vd^2-(diff(f1(t), t))^2)};

ics := {f1(0) = h, f2(0) = 0};

sol := dsolve(ode union ics);

x := unapply(eval(f1(t), sol), t);

y := unapply(eval(f2(t), sol), t);

plot([x(t), y(t), t = 0 .. 10], scaling = constrained) end proc;

MD(10, 1, 5);

However, "sol" is returned NULL, which means the equation has no solution. I supposed I completed the motion part of the problem correctly. Please help me or point out an another method

Hello everyone,

I'm working on a simulation for standing wave to prove that the combination of 2 waves in opposite direction can create standing wave. So I use these:

> restart;
> with(plots):
> W1:=A*cos(omega*t-k*x);

> W2:=A*cos(omega*t+k*x);

> W:=W1+W2;

> SW:=(A,omega,k)->animate(plot,[{W1,W2,W},x=-4..4,y=-4..4,color=[red,green,blue],scaling=constrained],t=0..5,frames=10);

> display(SW(2,2*Pi,5),insequence);

It did work if SW is a function with one variable, now I need 3 variables (A,omega,k);

It said: "Plotting error, empty plot"

Please show me my mistake or an another method. Thank you

Hello everyone, I'm a new one to Maple, I've just learnt some basic tools.

I want to creat a command that can animate the graph of line y=ax+b by the parameter a, and b will be subscribe later. For example, I can plot y=x+b by:

F:=b->plot(x+b,x=-1..1):

display(F(1));

It did work.

However, applying this with animation didn't seem to work. 

F:=b->animate(plot,[a*x+b,x=-1..1],a=0..10,frames=5):

display(F(1));

It did not create an animation, instead 5 frames of this graph for a=0, 2.5, 5, 7.5, 10

Please show me a solution for this problem, thank you