Hello,

I've just asked maple to plot a(s) from s=0 ..10 where a(s) is the absaolute value of a complex piecewise function. When I enter the command to plot:

> plot(a(s), s = 0 .. 10, discont = true);

maple just shows 'Evaluating' and fails to produce anything. I've left it for up to 20 minutes without any result. Maple has successfully plotted very similar things before in a matter of seconds so I don't think time is an issue here. The full script is as follows:

I couldn't find a command for this. Is it possible that does not exist for this every day problem?

What's wrong with my loop? It works fine if no_legs is set to 3, but when it is set to 2 or 4 it doesn't work (as in the picture). The code is to list combinations, as in http://www.mapleprimes.com/questions/149475-How-Do-I-Create-Combinations-According. I'm really stuck. Thank you for any help!

Hi everybody,

 

I already discussed my tasks with @Preben Alsholm. Therefore, I decided to share it with you and try to finalize solution.

Actually, I want to calculate heat dynamics transfer between one, two or more rooms. Hence, I used heat balance approach to set the system of differential equations:

Hi, 

     I was wondering why numeric integrals that approach zero converge slowly? Is there a way to arrive at the answer (0) faster? Besides proving it symbolically

Hi,

Help please! Maple beginner here. I'm trying to relabel a list of lists and sets so that the third occurrence of each number becomes that number+1,

 

eg. [[1],[{1,2}],[{1,2}]] ----->  [[1],[{1,2}],[{2,3}]]

or [[1],[{1,2,3}],[{1,2}]] -----> [[1],[{1,2,3}],[{2,3}]]

 

I think because there are sublists and subsets, I can't use things like member(x, s, 'p') or SearchAll (ListTools), so not sure what to do. Any suggestions?

For a question i'm trying to make for my students i need to solve a system of two linear equations, of which the coefficients are determined by predefined random variables. After that i need to assign the solution of the system to two variables. So far i have attempted two approaches, neither of which seem to work:

Solve using inverse matrix:

$oplossing=maple("with(LinearAlgebra):Matrixinverse(Matrix([[1,1],[tan(Pi*alphadeg/180),tan(Pi*betadeg/180)]]))*Vector([$F*sin($gamma),$F*cos($gamma)])");...

Hi everyone,

I am new to Maple, and require the use of grtensorii in my research. The package is installed correctly and will open fine, but it has troubles in finding the metric files to use. When I try to qload the metric I want I get the error message:

Error, (in qload) Could not find metric perturbed.

I have spoken to some colleagues who ran into similar issues making grtensor compatible with Maple 15, and they ran the commands

unprotect(sqrt);

I'm very new to Maple and can't figure out how to do this:

I have these possibilities:

for 1 - [1],[2],[3]

for 2 - [1,2],[2,1],[1,3],[3,1],[2,3],[3,2]

for 3 - [1,2,3],[2,3,1],[3,1,2],[3,2,1],[2,1,3],[1,3,2]

and I want to find all the possible combinations when they are in, say, the order of [3,2,1]

eg.

[[1,2,3],[1,2],[1]],

[[1,2,3],[1,2],[2]],

[[1,2,3],[1,2],[3]], 

[[1,2,3],[2,1],[1]]

Hi, all

I want to get some formular by the maple. I have some S domain transfer function, want to transform to the Z domain, but I don't know the way to realize it, is there any library function like "c2d" as in the Matlab? but "c2d" can not deal with the expression.

Thanks for replay to me!!!

Hi, I am hoving trouble understanding how variables are meant to be declared. I have global variables that I wish to use that are tabled values such as m[1], ie: m subscript 1.However, when declaring parameters, local, or global variables within a procedure it does not allow them to be tables values. Why is this? and How should i be declaring these values?for example:Range:=proc(b[1]).... b subscript 1 will generate invalid parameter declarationRange:=proc(b) local c[1]...c subscript...

I ran into an interesting situation with numeric integration.

For a simulation task I need to evaluate an overlap integral of a pair of 3-d ellipsoids which have a certain aspect ratio and the axes of which are tilted against each other. The distribution in each plane is Gaussian, but with largely differing sizes. While I have an analytic expression for the result; the integration (along a certain direction) cannot be done analytically and so I integrate numerically....

hello guys , i have an autonomous system , maple give me this warning when i want to compute its fixed points !

 

thank you for your time

 

mm.mw

Hello every one,

I am facing problem with for loop. Please have a look.

My code is

restart;with(PDEtools):

Eq1:=diff(u(eta,t),t)=C*diff(u(eta,t),eta$2):

BCs := {u(0,t)=sin(t), u(L,t)=0}:

ICs := {u(eta,0)=0}:

L:=600:

sol:= pdsolve(Eq1,ICs union BCs,numeric,time=t,range=0..L);

for i from 0 to 600 do 

for t from 0 to 3 by 1 do

for C from 0 to 1 by 0.1 do

p0[C,t]:=sol:-value (C,t):

sol[2] := [[2, 1], [3, 4]];

for i from 1 to nops(sol[2]) do

sol[2][i] := [seq(op(k,sol[2][i]), k=nops(sol[2][i])..1, -1)];

T := T + table([seq(op(k,sol[2][i])=op(k-1,sol[2][i]), k=2..nops(sol[2][i])),op(1,sol[2][i])=op(nops(sol[2][i]),sol[2][i])]);

od;

final result should be

1 2 3 4

2 1 4 3