MaplePrimes Questions

When Maple displays the results of a do-loop, it usually assigns only one label (e.g. '(2.1)') to the whole bunch of results.

Is there a way to have Maple assign a label to each expression resulting from some do-loop commands?

I refer to a specific solution using the label. I get two equations after using solve, and I want to introduce them in another system to solve applied again.

dear friends:

  i do some working with physics package.i met a problem that  i can't solve .i want you to help me.

thanks alot.

with(Physics):       Am := Annihilation(x); Ap := Creation(x)

the exprssion is collect --Physics:-AntiCommutator(Am,Ap) = 1

the result is not simple enough--[Ap.Am, Ap]_=Ap+Ap^2.Am

because Ap^2.Am=0 in quantum,

so I just want to get the result--[Ap.Am, Ap]_=Ap,but fail.

I am building a robot arm,now I want to replace the rigid arm with the flexible arm. How can I control the arm's form?

Please explain me why it happens:

 

with(LinearAlgebra);

MatrixInverse(`<|>`(`<,>`(a, c), `<,>`(b, d)));

Error, MatrixInverse is not a command in the LinearAlgebra package

 

WHY? Whats wrong, please explain me?

Hey Guys,

I am trying to plot a graph using the following code:

with(plots); restart;
a := sum(m^i*exp(-m)/factorial(i), i = 0 .. c);
l := [];
for c from 0 to 40 do
l := [op(l), a]
end do;
plotlist := [seq(plot(l[n], m = 0 .. 40), n = 1 .. nops(l))];
plots[display](plotlist);

I would like to plot this fuction as a loglogplot.  Can anyone help me with this?

 

Thanks in Advance

Hi guys,

I am dealing with a function, kappa:=6*log(R)/(R^2). To plot this, I use the command plot([kappa,R,R=0.99..6]).

However, I want the first branch of the graph to be coloured in fully, and the second branch to be dashed. Is this possible? I think I need to split the graph in 2 using the command line.

 

Thanks in advance

 

 

Hi,  I've been looking for a soln for my problem and found this thread quite relevant.

Here's what i have is

PEffSQ := proc (Egx, Egy) if Egy <= Egx then 100*evalf(subs(subs(Eg1 = Egx, Eg2 = Egy, EV), SX(Egx, Egy), PCellMax/PInc)) end if end proc

and then I tried to run this maximize

maximize(PEffSQ(eg1, eg2), initialpoint = {eg1 = 2.3, eg2 = 1.4}, variable = [eg1, eg2])

And just like the problem i have with plotting values from this procedure, i have the following error:

Error, (in PEffSQ) cannot determine if this expression is true or false: eg2 <= eg1

Any suggestions?

Thanks in advance!

 

Hi,

i want a first order condition as which expresses the optimal l as a function of q and a

I did this

diff((q*l^(1/3)*q)*(1-l)^(1/2)+(1-a)*(1-q*l^(1/3))*q*(1-l)^(1/2)+a*(1-q*(1-l)^(1/2))*q*l^(1/3), l)

and got

(1/3)*q^2*sqrt(1-l)/l^(2/3)-(1/2)*q^2*l^(1/3)/sqrt(1-l)-(1/3)*(1-a)*q^2*sqrt(1-l)/l^(2/3)-(1/2)*(1-a)*(1-q*l^(1/3))*q/sqrt(1-l)+(1/2)*a*q^2*l^(1/3)/sqrt(1-l)+(1/3)*a*(1-q*sqrt(1-l))*q/l^(2/3)

which i think is right

Thank you for your post! But I`m newbee in MapleSim and have one stupid question. Can you explaine how to compute the g-force magnitude and feeding it into the TSDA? May be, you post msim-file or screenshot?

Hello,

 

I have 3 points:

A:=<a,b,c>;

B:=<e,f,g>;

C:=<h,i,j>;

Please show me what is wrong: plane(p1,[A,B,C],[x,y,z])

how to make a plane with these points.

error: Error, (in geom3d:-Equation) wrong type of argument

Thanks a lot!

hi dear friends

 

i want to solve this int with numeric methods such that doesn't contain erf function

 

thanks alot

 

(my function is e1, and I want to calculate the int of e1)

 



Hi everyone, I just created my account in mapleprimes but I regularly find solutions to my problems searching through the posts, however, this time I was not so lucky.

I have the following problem in Maple: I have defined two procedures, A(v::array) and At(v::array) which perform simple algebraic tasks on 2x1 arrays. Then, I redefined the operation `+` when acting on two such arrays using overload. This new definition for addition does not correspond to normal matrix...

With the idea developed by Robert Israel on the

Please help me understand why this error occurs:

 

PlanesTetrahedron := proc (A, B, C, D)

local plane1 := 0; plane2 := 0; plane3 := 0; plane4 := 0; Plane1 := 0; Plane2 := 0; Plane3 := 0; Plane4 := 0; M := 0; CutPoint1 := 0; CutPoint2 := 0; CutPoint3 := 0; CutPoint4 := 0; V := 0; Temp1 := 0; Temp2 := 0; Temp3 := 0; Temp4 := 0; S1 := 0; S2 := 0; S3 := 0; S4 := 0; temp := 0;

plane1 := Equation(A, [x, y, z]);

plane2 := Equation(B, [x, y, z]);

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