I'm am new to maple and am not very familiar with it.

I have a state space represnetaiton (Xdot = AX+Bu  y+CX+Du)of a 3rd order non linear system.

X=[X1; X2; X3]

Xdot=[X1dot; X2dot; X3dot]

A=[0 -1 -1; 1 0.2 0; X3 0 -2.4]

B=[0; 0; 2]

C=[1 0 0]

D=0

With initial conditons:

X1(0)=X2(0)=x3(0)=An arbitrary concept of my choice.

I need to plot x1(t) Vs time.

I also need to plot the state trajectories...

Hi,

I am really stuck in one more bit thats the least square problem.  leastsquare1.mw 

Hope someone can help me to solve this bit and get me out of this problem :(.

Least square method is successfuly implemented in MATLAB code (WRITTEN IN THIS MESSAGE AT THE END), but I couldn't do it in Maple.  I am having problem in the for loop section,  I am attaching Matlab code and  maple code ...

I have a differential that I'm solving using rk4 on maple and I want to plot the resaulting points in an interval. How do I do that?

here is what I've already done:

> f := {y(0) = 0, diff(y(x), x) = cos(5*y(x))-x};

> p := dsolve(f, y(x), numeric, method = classical[rk4], stepsize = .1);
proc(x_classical)  ...  end;

> for i from 0 by .1 to 3 do p(i) end do;
           ...

scatter2d  quantile2 scatter1d is removed?

with(stats): with(statplots): with(transform):
with(random): with(describe): with(plots):
datax:=[normald[5,1](100)]:
datay:=[normald[7,3](100)]:
scatter2d(datax,datay);
quantile2(datax,datay);
scatter1d(datax);
scatter1d[jittered](datax);

who(things) replace it?

i have a systems of differential equation:

J[n]=2*A[n]

S[n+1]=J[n]

A[n+1]=S[n] + 0.5*A[n]

with initial condition A[0]=10, J[0]=30, S[0]=5

i have a had time writing a procedure for this systems. help please

do i need a for command for this procedure

Can you divide 2 polynomials with Real coeffs.   eg 1.87x³-2x²+5.789x- 3,2 by    1.5 x²+2x-1.4 to get the quotient and remainder? If so how?

hello
my duty variational iteration method for solving nonlinear equations with maple code need finding.
I looked but I could not google
please help me

Hello,

Suppose that S1,S2,S3 are 3 blocks of a matrix S := Matrix(...). I would like to do

out := ArrayTools:-Concatenate(2,convert(S1,vector),convert(S2,vector),convert(S3,vector)):

but in the case when I have n blocks.

Thanks,

Dimitar

given : A(n+1)=2*A(n) , A(0)=70

write a procedure and find A(5)=?

Why the result can't execute?

I am aware of how to plot the feasible region defined by a system of linear inequalities (inequal in the plots package). Also, I can use the implicitplot command to plot the feasible region defined by a single nonlinear inequality. My question is, how do I plot the feasible region defined by a system of nonlinear inequalities. For example, how would a graph the region satisfying x>=0, y<=exp(-x), and y>=x^2?

i stroe the x coordinate in arry A, and y in arry B

for example

A:=araat([x1,x2..,xn])

B:=ayaay([y1,y2..,yn])

how can i plot this data,

i had tried the follows expression:

plot(x,y)  or plot(x[i],y[i],i=1..n)

but they all return the wrong answer, why?

given a recursive sequence : J(n)=b*A(n)  for b=0.5 , A(0)=70% , n is integer

wrote a procedure to find J(n), for example: find J(5)=?

i need help with this please .

I hope someone can help me.

I'm trying to integrate the following equation:

sin(v))*sqrt(cos(t)^2+4*sin(v)*sin(t)*cos(v)*cos(t)*sin(w)+4*cos(v)^2-cos(w)^2*cos(t)^2+cos(t)^2*cos(v)^2*cos(w)^2-5*cos(t)^2*cos(v)^2)

The boundaries are
v=0..1/2*Pi
w=0..2*Pi

I've tried evalf and simplify, but none of those worked. Does someone know how to solve this one?

Hello,

Can someone explain to me why when "x:=vector(2):" is used in the code below, the file "test_file.c" is generated correctly, while when "x := Vector(2,symbol=v):" is used, there is an error:

Error, (in codegen/makestat) symbol or symbol::type or symbol:=expression expected in parameter list

-------------------------------------------------------------

with(LinearAlgebra):
with(codegen, C, makeproc):

#x := Vector(2,symbol=v):