I wish to display in 2D a vertical arrow with amplitude oscillating sinusoidally between 1 and -1.  Hours studying help files and attempting to craft a command to produce this simple result yield nothing but unhelpful error messages. Please provide the command that will do it.

Hi!

 Sorry for my english, I'm french! :)

I try to make a modelisation of pedestrian dynamics.

Look:

There's someone, (a dot in Maple) at some randomn place in a square.

He want to go to another place.

So, there's 3 dot in Maple:

- S: The start fixed

- X: Mr X who is traveling from S to E

- E: The end fixed

so, without any rule, X is drawing a line from S to E.

I have a long expression which I want to factor optimally.  If I can cancel terms in the numerator and denominator, great, and if not, I just want to reduce the size as best possible.  Maybe there will be terms such as

(x1² + x3² + y1² +y3²)*(x2² + x4² + y2² + y4²)

which I see when factoring the denominator by hand.  Here's the worksheet, the final...

The Question was like this:

Using this program as a basis, write a procedure  so that Maple performs a trapezium rule approximation of

the integral of

When I use the solve command in Maple15 nothing happens. I just want to solve for V and Cf.

Does maple not like implicit equations? The file is attached

hi,

how to solve Ax=0 ?

A is 8*8 Matrix and det(A)=0
how to find x (x1,x2,...,x8) ? 

thx;

aryan.

This is the procedure for the question I posted on http://www.mapleprimes.com/questions/128600-Romberg-Approximation-Procedure-In-Maple?sq=128600 

Can anyone see where the problem is?

RombInt:=proc(f,a,b,m,n)
local j,k,R;
if type(m, numeric) then
   if not type(m,nonnegint) then ERROR("m must be a non-negative integer"); fi;fi;

Hi, I want my output to be column vectors, how do I use the printf statement?

Hello there,

When I was trying to solve a differential equation with dsolve, I've got such a error report:

> dsolve({Q(0) = F[Az], diff(Q(x), x) = q[2](x)});

Error, (in dsolve) found the following equations not depending on the unknowns
of the input system: {Q(0) = -(1/4)*l^2*q[0]-(1/4)*l^2*q[0]*exp(2)+F}

But if I only write:

> dsolve(diff(Q(x),x)=q[2](x));

then there is no problem. 

How to find the discontinuities of the function
g:=unapply(int((1-z*(cos(t)+cos(2*t)))/(1-2*z*(cos(t)+cos(2*t))+2*z^2*(1+cos(3*t))),t=0..Pi),z);

over the reals with Maple?

Hello,

I'm using Maple 7 and got a question:

I've got the function y

y:=x->(x)^0.5; ug:=0; og:=10;

and

xs:=2;

ys:=3;

How do I create a point with the coordinates [xs,ys] and plot it with the function y in one graphic?

I'm using plot(y(x),x=ug..og); to plot the function y.

Thanks for your help!

flash20001

hi,i want my output be a complex number,how do i use the printf command?for example  s=3+4*i be a output.

Hey, I need to write a procedure to calculate the romberg approximation by combining the trapezium rule approximations. The command will be RombInt(f(x),a,b,m,n), where a and b are the 2 limits and m is a number more or equal to 0 which indicates the number of iterations and n is a integer more or equal to m. Also given is that when m=0, this approximation can be called TrapRule(f(x),2^n,a,b). (I have got the procedure for this traprule, if that helps)

So basically...

Hey, I have made this procedure for the trapezium rule but I get an error when I perform this calculation.

Procedure is 

TrapRule:=proc(f,N,a,b)
local k,sum1,h,i:
h:=(b-a)/N:
sum1:=0:
for i from 1 by 1 to n-1 do
sum1:=sum1+f(a+i*h):
end do:
k:=(h/2)*(f(a)+2*sum+f(b)):
return (k):
end proc:

When I try calculating (TrapRule(exp(x),4,-3,1)); I get 

Error, (in TrapRule...

Simple question:

Solve y''(x)-y'(x)+2y(x)=10e^(-x)sin(x)

Mathematica answer:

which is correct.

Maple 15 can get the homogeneous solution (the first two terms) but the particular solution? Not as we know it.

y(x) = exp((1/2)*x)*sin((1/2)*sqrt(7)*x)*_C2+exp((1/2...