Dear Users!

Hope you would be fine. I want to export .dat file from 2D plots in attached file. But facing some problem. Please have a look and try to fix it.

Many thanks

2._SP_alpha_varies.mw

Special request:

@Carl Love

@acer

@Kitonum

Maple is very good in solving PDE's. But this specific solution seems way too complicated when compared to Matematica solution, which I verified using Maple pdetest to be correct.

Is there a way to make Maple produce the simpler solution to this pde? simplify does nothing on the solution. May be by using a good HINT or such other option? 
 

Here is screen shot showing the other solution

Download q1.mw

hello!

I'm new in Maple!!

I am try simulate the termal flux in composite material using heat equation and perfect contact between the materials. But I can't enter the fourier condiction and my code don't work!!

Any help??

> restart; with(plots); with(PDEtools); with(plottool
> eq1 := diff(u1(x, t), x, x) = k1*(diff(u1(x, t), t));
                    d  / d          \      / d          \
                   --- |--- u1(x, t)| = k1 |--- u1(x, t)|
                    dx \ dx         /      \ dt         /
> eq2 := diff(u2(x, t), x, x) = k1*(diff(u2(x, t), t));
                    d  / d          \      / d          \
                   --- |--- u2(x, t)| = k1 |--- u2(x, t)|
                    dx \ dx         /      \ dt         /
> L := 10; v1 := 20; v2 := 10; k1 = 10; k2 := 20;
                                     10
                                     20
                                     10
                                   k1 = 10
                                     20
> bc1 := u1(0, t) = v1, u1(x, 0) = 0;
                         u1(0, t) = 20, u1(x, 0) = 0
> bc2 := u2(0, t) = v2, u2(x, 0) = 0;
                         u2(0, t) = 10, u2(x, 0) = 0
> sol1 := pdsolve({bc1, eq1});
Warning: System is inconsistent

Hello,
I would like to display a complete trigonometric circle.like the attached photo. How to do it? Thanks 

TrigonometricCircle.mw

It is necessary that the expressions are combined in a new function. So as I'm trying not is obtained.
 

Download testmaple.mw

Dear Users!

Hope you would be fine. I want to export dat file for 3D plot in maple and want to replot it any perfessional software like tecplot, origin.

u:=sin(x+y):
plot3d(sin(x+y), x = 0 .. 2*Pi, y = 0 .. 2*Pi);
How can I export the data in 3D. Thanks in advance for you help.

Apostrophe '  is always interpreted as a "differentiate command", i.e., A' is always translated  to diff(A(x),x).

Is it possible to override this behaviour, it is to say, is there a way for using A' as a variable name?

In euclidean geometry of triangles, A' is a common name given to some points built from vertex A of a triangle ABC.

Thanks in advance,

César Lozada

Please check this code and fix the error. And help me with the below two questions.

1- In the above image, I'm getting the error when I'm to plot my solutions.

2- How to get information from this system?

      The values of x_1 and corresponding y_1 and so on and errors etc

This is a downloadable link to my worksheet [Practice.mw]

Thanks!

How do I get Maple to factorize this simple expression without too much effort?

f:=3/2 + sqrt(8*k + 2) + 2*k

I want to create a distribution table and then find expected value,variance and standard deviation.

For example : X=-1,P(X)=0.2
                       X=0,P(X)=0.25
                       X=1,P(X)=0.35

                       X=2,P(X)=0.2

E(X) would then equal -1*0.2+0*0.25+1*0.35+2*0.2.

How can I do all of this with Maple ? 

How should linearization a nonlinear equation with maple?

I'm trying to use the ExpectedValue function to get the next close value of a stock.

restart; with(Finance)

W := WienerProcess()

T := 1.0

S := SamplePath(W(t), t = 0 .. T, timesteps = 100, replications = 10^4)

A := S[1 .. 10^4, 50]

TI := 1

AN := 100 (Start Value)

sigma := 3.5 (volatility)

r := 0.5e-1    (interest)

ANF := AN*exp((r-(1/2)*sigma^2)*TI+sigma*W(TI))       (ANF: is the forecasting Value)

ExpectedValue(ANF, timesteps = 100, replications = 10^3)

Is this approach right?

Why it be like that and how to solve it ?

>restart;
> ODEtools[declare]((S, L, B)(t), prime = t);
         ODEtools[declare](S(t), L(t), B(t), prime = t)
> DE1 := diff(S(t), t) = -L*S*beta-`μS`+mu;
                    d                               
            DE1 := --- S(t) = -L S beta - μS + mu
                    dt                              
> DE2 := diff(L(t), t) = L*S*beta-(gamma+mu)*S;
                  d                                  
          DE2 := --- L(t) = beta S L - (gamma + mu) S
                  dt                                 
> DE3 := diff(B(t), t) = L*gamma-gamma*mu;
                      d                           
              DE3 := --- B(t) = L gamma - gamma mu
                      dt                          
> init_conds := S(0) >= 0, L(0) >= 0, B(0) >= 0;
         init_conds := 0 <= S(0), 0 <= L(0), 0 <= B(0)
> sys := {init_conds, diff(B(t), t) = L*gamma-gamma*mu, diff(L(t), t) = L*S*beta-(gamma+mu)*S, diff(S(t), t) = -L*S*beta-`&mu;S`+mu};

> sol := dsolve(sys, numeric, parameters = [mu, beta, gamma, S(t), L(t), B(t)], method = rkf45);

Error, (in dsolve/numeric/process_input) system must be entered as a set/list of expressions/equations

> sol(parameters = [mu = .234, beta = 2.345, gamma = 5.678, S(t) = 6.678, L(t) = 6.789, B(t) = 7.123]);
           sol(parameters = [mu = 0.234, beta = 2.345, gamma = 5.678, S(t) = 6.678, L(t) = 6.789, B(t) = 7.123])

Is the following a bug? I am using Maple 2019  64 bit with latest Physics package 357 on windows 10.

Download bug2.mw