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here is the code that shows the error message

are there anyone can help me a little bit and check it why?

Hello,

I wish to enter in the math dot operator but I can't find the way to enter it in the document mod. I also searched the help and did not find a way.

all I want is to enter dot(varphi)

thanks

Rami

Hello,

I have a big problem and I don't know how to resolve it.

I have two matrices: A and B. I want to use B[1] as an index of A ,i.e., 

B[1] := [1, 1]; Ok

A[B[1]]; But this does'nt work. 

Thanks for your help...

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...

Dear All,

I have an equation to solve. 

1= sum_{i=1}^n 1/(x+a_i) where a_i is given. I want to solve this equation for unknown x. I know there is a value between 0 and 1. Although I can find the solution by numerical method, I am interested in close form to solve this equation.

Help please.

Best Regards,

Saeid

I have the function which I run well in Maple V
but in maple 15 .It's wrong. How can it be? and please help me to edit it.

for i from 0 to 15 do
t:=1+i/16;
p.i:=plot(sin(x*t),x=-10..10,axes=none):
od:
display(array(1..4,1..4,[[p0,p1,p2,p3],[p4,p5,p6,p7],
[p8,p9,p10,p11],[p12,p13,p14,p15]]));

Hello,

Could you please help me with the following system of equations:

> restart; with(student);
> Z[0] = 377;
> solve({Z = 1/(j*w*C[1]+1/(j*w*L[1])+1/R)+1/(j*w*C[2]+1/(j*w*L[2])), C[1] = w[c]*(w[0]^2-w[c]^2)*(w[2]^2-w[1]^2)/(2*Z[0]*(w[1]^2-w[c]^2)*(w[0]^2-w[1]^2)), C[2] = w[c]*(w[0]^2-w[c]^2)*(w[2]^2-w[1]^2)/(2*Z[0]*(w[1]^2-w[c]^2)*(w[2]^2-w[c]^2)*(w[2]^2-w[0]^2)), L[1] = 1/(w[1]^2*C[1]), L[2] = 1/(w[2]^2*C[2]), R[1] = subs(w = w[1], 2*Z[0]*(1-S[21...

hi everybody!!

i have tried to (solve /Numerically Solve)  the equation below 

x-(sin(88.61) TAN(286.13)*(45567))/(sqrt(sin(49.12)^2+2 sin(49.12) TAN(14.93) cos(49.12)+2 sin(49.12) TAN(286.13) cos (88.61)

cos(49.12)+2 TAN(14.93)^2 cos(49.12) TAN(286.13) cos (88.61) sin(49.12)+2 TAN(286.13)^2 cos^2 (88.61)^2 cos(49.12) TAN(14.93)

sin(49.12)+TAN(286.13)^2 cos^2 (88.61)^2 TAN(14.93)^2 sin(49.12)^2+TAN(286.13)^2 sin(88.61)^2+TAN(286.13)^2 sin(88.61)^2

Hi I'm new to maple and have to solve this:

Find the transferfunction

I beleve the answer should be:
H(s) = Y(s)/G(s)  =  1/(s^2+(1/4)s+1)   (correct me if I'm wrong)
but i have to show how to do it in Maple in a scool project

please help me have tried for several hours now, but cant get it right

Hello

I need some help on a problem which seems simple...

I'm doing as follows:

restart; with(LinearAlgebra); with(plots):

II[C] := proc (delta) options operator, arrow; 230/(84192.96489-230*cos(delta)+(-1)*4128.950345*sin(delta)) end proc

(sorry for the formatting)

plot(II[C](delta), delta = -Pi .. Pi)

(This works just fine and produces a nice plot, then I continue)

f1 := plot(II[C](delta), delta = -Pi .. Pi)

Hi,

I asked a similar question some time ago : http://www.mapleprimes.com/questions/123925-Shortcut-Key-AltShiftF6.

I'm still on Maple 13, and I still have not found a way to switch between tabs/windows using the keyboard.I am in the one Maple session (ie I haven't started a new one).

I tried all suggested combinations, including all combinations of Ctrl, Alt and Shift...

Hi, can anyone help me with this questions? Thanks!

Use maple to find the general solution to the following system of linear equations:

2x₁  + x₂ - x₃ +3x₄ = 2

x₁ + 2x₂ -x₄ = -1

3x₁ +2x₂ -2x₃ +x₄ = 1

Hi,

Im not sure if anyone can help but whenever I plot a graph maple freezes. It looks like the program just refuses to plot it and repeats the command until i get to past where the graph should be at which time it goes back to working fine.

Another way of describing the error is, whenever i...

Dear all,

Some time ago I asked a question concerning the algorythm for numerical dsolve and related issues here.

I got a nice answer from pagan and implemented the algorythm.

However, since my system is big, the iterations take long time.

Here is the code itself:

sys1:=[TRIC[1],TRIC[2],TRIC[3],TRIC[7],TRIC[8],TRIC[9]]:
> sys2:=[TRIC[4],TRIC[5],TRIC[6],TRIC[10],TRIC[11],TRIC[12]]:
> GRAD:=subs(u=FF[1](t),a=FF[2](t),k=k(t),tau=tau(t),psi[1...

Hey everyone,

   When I type ?command to view help pages, Maple always says "No Matches Found." For example, when I enter the command ?plot to bring up a help page on plots, Maple will say "No Matches Found."

How do I obtain the Maple help files?