Hi everyone,

when I use:

c:=2e-6*Unit(A*s/V);

then maple answers with the unit [F]. but when I use:

epsilon[0]:=8.85e-12*Unit(A*s/V/m);

then in the middle of a large document, Maple (Version 12) ignores [m] and still gives me [F]. On a blank (new) document the same command results in correct units [m^-3 kg^-1 s^4 A^2]. The behaviour is reproducible.

anyone knows why?

cheers :-)

 

 

I want to graph a real-valued function e.g. plot y=x^2 from x=1 to 2.  There used to be a function called "plot2D". But it does not exist any more. When I call up the glossary or Help list, I get hundreds of plot-related functions - countourplot, loglogplot, etc - but not a plot for doing a real-valued function.  It is not under with(plots): 

In Advanced Engineering Mathematics there are a lot of math symbols within the text that don't execute. They're not simply an inert math statement, like Int or Diff, but rather the symbolic math used solely as text. How is this done?

Does anyone know a way of quantizing sensor data in MapleSim?

I cant figure out how to add friction to my translating block. This is an example of what I was trying I thought I would take the Translational friction component attach it to the current force line being applied (because the direction of motion can be extracted from it) and then attach the friction force line and the original force line to the block im moving. I have tried hooking this up in series and in parrallel (the picture is with the component in parrallel) Here is a picture because this is hard to follow: http://yfrog.com/eufrictionattemptj

Can I store data in a 3D Matrix in Maple ?

I'm trying to make the following question into a Maple TA question;
Find the orthogonal matrix R that diagonalizes the matrix A = .

 

I want to solve the following PDE with boundary conditions, but unfortunately I do not know the meaning of _F1 and _F2 in this stuation. Would you please help me to find these arbitrary functions?

> PDE := diff(U(y, z), y, y)+diff(U(y, z), z, z) = 0;

> with(PDEtools);

Hi,all, I found a weird problem. When I use alias of RootOf in a procedure, it seem that it cannot work correctly. The code is as following: > restart; > cf := proc (n, ir) local P; alias(x = RootOf(ir)); P := evala(Expand(x^4)) mod 2; print(P); end; >cf(4,x^4+x+1); x^4 ---------------------> should be x+1 However, when I use it in seperate commands, it works fine. > restart; >alias(x = RootOf(x^4+x+1)); >P := evala(Expand(x^4)) mod 2; >print(P); x+1 I have no idea what is wrong here Thanks Gepo

 

I want to solve the following PDE with boundary conditions, but unfortunately I do not know the meaning of _F1 and _F2 in this stuation. Would you please help me to find these arbitrary functions?

When using Threshold on an image that has been converted to grayscale is it not the same as this loop?

a:=ToGrayscale(img);

for i from 1 to Width(a) do
  for j from 1 to Height(a) do
    a[i,j] := round(a):
  od:
od:

 

 

The following program produces a plot in the 4th quadrant.

S1:=unapply(u*FresnelS(u)+((1/Pi)*cos((1/2)*Pi*u^2))-(1/Pi),u);

C1:=unapply(u*FresnelC(u)-((1/Pi)*sin((1/2)*Pi*u^2)),u);

R1:=1;

u1:=evalf(sqrt(0.4));

E1:=evalf(Pi*R1*S1(u1)+R1);

D1:=evalf(Pi*R1*C1(u1));

with(plottools);

with(plots);

c1 := circle([D1, 0], R1);

a:=evalf(Pi*R1*u1);

p1:=plots[display](plot([1+a*FresnelC(u),a*FresnelS(u)-E1,u=0..u1]),c1,scaling=constrained);

p3:=plot(0,x=-1..0);

display(p1,p3);

 

Download 16210_compressed form.mws
View file details

 

My friends, I am trying to compress a very long equation. Can any one help me to make it possible to compress the equation, means to write it in a very very simplified form. The real reason for this hardwork is that the equation is very long to write it in latex.

Your quick response is required.

Thanks to all

Hi everybody and thanks a lot for your help!

My problem is the following: I would like to draw a phase diagram for a system of 3 differential equations. So far this is not a problem but I would like to have the arrows of the vector field included in the diagram, like it is possible for systems of 2 diff. equations. Is that possible?

I use DEPlot3d, I suppose that is the correct tool?

Thanks and regards

Hans

I have the above program

S1:=unapply(u*FresnelS(u)+((1/Pi)*cos((1/2)*Pi*u^2))-(1/Pi),u);

C1:=unapply(u*FresnelC(u)-((1/Pi)*sin((1/2)*Pi*u^2)),u);

R1:=1;

u1:=evalf(sqrt(0.4));

E1:=evalf(Pi*R1*S1(u1)+R1);

D1:=evalf(Pi*R1*C1(u1));

with(plottools);

with(plots);

c1 := circle([D1, E1], R1);

a:=evalf(Pi*R1*u1);

plot([a*FresnelC(u),a*FresnelS(u),u=0..u1]);

p1:=plots[display](plot([a*FresnelC(u),a*FresnelS(u),u=0..u1]),c1,scaling=constrained);

p3:=plot(0,x=-1..0);

display(p1,p3);