So this is my minimal working code. Everything works, but I cannot get the arrow size fixed you can see the animation propperly. Adding wid=1/2 gives an error message.

dsolve.mw

Hi all, I want the bewst for you.

Could anyone help me with this bad equation, please?

Regards.

This message is for those who prefer use Maple in 1-D Math Input.

In 1-D Math Input, in previous versions of Maple, it was very comfortable to have the freedom to write ONE large statement in Continuing ON SEVERAL LINES for clarity and better reading from a *.wm file.

Here are simple examples, but in reality, I work on very complex cases.

Example #1:

A := u*( x + ln(x +1) + cos(x))

     + v*(1 + sqrt(x))

     + w*(sin(x) + tan(x) + x);

Example #2:

Vector([cos(s)*cos(t)

          , cos(s)*sin(t)

          , sin(s)]);

Example #3:

display(

  plot(f(x), x = x1..x2)

, plot(g(x), x = x1..x2)

, plot(h(x), x = x1..x2)

);

In Maple 2015 with a *.wm file, when you try to execute these example in 1-D Math Input, an error is returned and unfortunately forces you to write everything on the same line, what makes reading tiring.

Is a bug or a voluntary deactivation?

Can you help me, please?

Guy.

I have drawn a 3d plot of a sphere in maple, but when I try to export this one in an .eps file, only the coordinate system of the plot is shown, but not the colourful plot. The export works if I use jpg and similar file types, but not with .eps, does anybody know if there is a way out of this problem?

Hi,

Is there a way to export worksheet to pdf format but not in A4 size since some lines are going beyond the page?

I have a problem solving a system of PDEs.

The system of PDEs are

PDE01 := -(l^2+1^2)*(diff(v(l, t), t))+(l^2+1^2)*(diff(R(l, t), l, l))+4*l*(diff(R(l, t), l))+4*l*v(l, t)/(l^2+1^2)^(1/4)-6*R(l, t)/(l^2+1^2)+(l^2+1^2)^(1/2)*(-1.1+sqrt(.1))^2*sqrt(24)*u(l, t) = 0

PDE02 := diff(R(l, t), t) = v(l, t)

PDE03 := diff(u(l, t), t)-sqrt((1.1^2-1)/1.1^2)*(diff(u(l, t), l))-2*l*sqrt(1.1^2-1)*u(l, t)/(l^2+1^2) = 0

the initial condisions are

v(l, 0) = 0, R(l, 0) = 0, u(l, 0) = sqrt((l^2+1^2)^(1/2))*10^(-5)*exp(-(l-10)^2/.5^2)

and the BCs are

bdry00 := {((30^2+1^2)/30^2)^(1/4)*v(-30, t) = -((30^2+1^2)/30^2)^(1/2)*(D[1](R))(-30, t), ((30^2+1^2)/30^2)^(1/4)*v(30, t) = -((30^2+1^2)/30^2)^(1/2)*(D[1](R))(30, t), u(-30, t) = sqrt(30^2+1^2)*10^(-5)*exp(-40000), u(30, t) = sqrt(30^2+1^2)*10^(-5)*exp(-10000)}

to solve the system,

I enter

pde := pdsolve({PDE01, PDE02, PDE03}, {bdry00, init00}, time = t, numeric, range = -30 .. 30, timesstep = 1/60, spaceste = 1/254)

then, I failed to get the result constantly.

I tried several cases changing the initial conditions...

Can you let me know what I am doing wrong?

I have a problem with IsMatrixShape. I have in my part of formulation this matrix expression: Q^TI_bQ

While I_b is a symmetric matrix, this matrix expression is clearly symmetric. However, when I try to check this issue with IsMatrixShape command, it returns false. I am extremely confused. Can anyone help me? Thanks in advance.

prob1.mw    prob2.mw

Hi, I don't know why this happened...

If I write the command in new sheet, it runs correctly( prob2.mw).

Second, help me to evaluate N, please...  (prob1.mw)

Regards :-)

Download Question_algsubs_3.27.15.mw

Hi,

I'm using maple to solve non linear DE system. The error below appeared. What to do?

eqd1:={diff(u(x),x)=U(x)}:

eqd2:={diff(v(x),x)=V(x)}:

eqd3:={0.004*x*diff(U(x),x)+(x-8*x*V(x)+0.006*U(x)+(3/2-12*V(x)-8*x*diff(V(x),x))*u(x)=0}:

eqd4:=(0.008*x*(V(x)^2)+2*(0.6+x)*v(x)*V(x)+v(x)*u(x)+(v(x)^2)=0}:

fonc:={U(x),u(x),V(x),v(x)}:

sol:=dsolve(eqd1,eqd2,eqd3,eqd4,fonc}:

Error, (in PDEtools/sdsolve) too many arguments; some or all of the following are wrong: [{U(x), u(x)}, {diff(v(x), x) = V(x)}, {1/250*x*(diff(U(x), x))+(x-8*x*V(x)+3/500)*U(x)+(3/2-12*V(x)-8*x*(diff(V(x), x)))*u(x) = 0}, {1/125*x*V(x)^2+2*(3/5+x)*v(x)*V(x)+v(x)*u(x)+v(x)^2 = 0}]

 

Hi

How can I obtain series expansion of a known mathematical function? for example I Need a command to get a formula for expansion of Bessel function as bellow

Dear all,

I know how interpolating curves using 1D Fourier tranform.

see http://www.mapleprimes.com/questions/121551-Fourier-Serie-And-Discrete-Fourier-Transform

How to use 2D Fourier transform to find a 2D Fourier series to interpolate surfaces as:

f := proc (x, y) options operator, arrow; sin(x)^2+cos(y)^2 end proc

plot3d(f(x, y), x = 0 .. Pi, y = 0 .. Pi)

Or surface data [x,y,f(x,y)].

Thank you

I'm attempting to plot the Nyquist plot for a complex system such that Maple cannot determine the frequency limits automatically, and suggested I use 'range' to specify the frequency limits. How do you do this? For example if you have a system G=1/(s+1), how do you plot the Nyquist plot in the frequency range 0 to 1rad/s?  Thanks

I make a new parameter in MapleSim, but I don't konw why it becomes to something as shown in the above figure.

In MapleSim environment, I can see these code, but I find that I cannot edit them.

Is there a method that I can edit these codes?

Thank you.