Hello All,

I am having a problem plotting the solution of a system of PDE's.  Maple evauates to a module, but when I try to plot any of the dependent variables (of space and time) vs time, all I get back is:

"PLOT(...)"

My module is called Final, and so my plotting command is as follows:

p1:=Final:-plot(A(z,t),t=0.5);

This is where I get "PLOT(...)".  Any help would be greatly appreciated!!! Thanks!

Hello.

I need to generate 200 random numbers from a normal(0,1). I used the following code:

N:=200:
Y:=Array(1..N):
for i from 1 to N by 1 do:
     Y[i]:=Generate(distribution(Normal(0,1))):
end do:

This code works. But the numbers generated aren't a random sample. You can check that in the following qqplot.

Dear my friends

Hi

I am solving a nonlinear differential equation by Maple. The equation is slarge. A large amount of memory is then required. I have a computer with 8 gigabytes memory. This memory o large and has many terms. Therefore, the algebraic expressions created in process of solving are so is very low to perform some commands of Maple such as "taylor" or "expand". I compel using the "restart" command to clear the memory after saving the results of each...

Let a:= (2x-1)/sqrt(1-4x²)  , b:=sqrt(1-2x)/sqrt(1+2x)

then c:=combine(a/b,radical,symbolic) is 1, it should be -1 !

(Multiply b top and bottom by sqrt(1-2x) to see this).

Am I misunderstanding combine?

Law of Hess and heats of dissolution in acid.^б-в Х, КХ

In 298.15 º K are set following the dissolution enthalpy of these compounds in HCl:

B₂O₃.3CaO           -344.86 kJ/mol,

B₂O₃.2CaO           -210.40 kJ/mol,

B₂O₃.CaO  ...

Hi I want to solve the following equation. For this I have written the following program. But Maple showing error.

eq := diff(x(t), `$`(t, 2))+326.1*(diff(x(t), `$`(t, 1)))+3190*(diff(x(t), `$`(t, 1)))^2-37500*sqrt(x(t)*(0.165e-2-x(t)))+2.825

ICs := x(0), Dx(0)-0

sol := dsolve({ICs, eq}, {x(t)}, type = numeric);

but it is showing 

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

eq := {-2*b[2]*B+b[3]*J+b[5]*J-lambda[2]*b[2] = 0, 
          -2*b[5]*B+b[2]*J+b[4]*J-lambda[2]*b[5] = 0, 
          -lambda[2]*b[3]-2*b[3]*B+b[4]*J+b[2]*J = 0, 
          -lambda[2]*b[4]+b[3]*J-2*b[4]*B+b[5]*J = 0, 
           abs(b[2])^2+abs(b[3])^2+abs(b[4])^2+abs(b[5])^2-1 = 0}

 v := {lambda[2], seq(b[i], i = 2 .. 5)}

 ans:=solve(eq,v)

the result show:

          ans:=

Hello all,

In reference to Acer's workaround for the operator form of the optimization package, I'm having difficulty applying the method to an optimization problem with 7 variables. I'm hoping you can help me see what I'm doing wrong. This is what I've got coded, where EIG is a fairly long, complex procedure that outputs a float value:

> objf := proc (V::Vector)

find the inverse of unction f(x)=(4x)/(x-2).

If I use

with(plots):
plotsetup('bmp', 'plotoutput' = "F://try1.bmp");
pointplot([seq([i,i^2],i=1..100)],legend="F[u]");

every thing is fine but if I change this to

pointplot([seq([i,i^2],i=1..100)],legend=typeset(F[u]));

Maple evaluates for ever!

The above works fine for inline display.

Is there a way round this apart from exporting from inline?

Hello,

there is a problem puzzling me, plot(tan(x),view=[-10..10,-10..10],discont=true) can plot tan(x) correctly, but when using smartplot(tan(x)),it yields an unexpected picture.

Is there any way to plot tan(x) correctly only using smartplot?

Thank you.

This problem has been doing my head in for a long time now! I'd be very grateful if anyone can help.

I need to plot this function f(r,theta,phi)=exp[-(r-r₀)²/2²]. where r₀=4 But first, if this is in spherical coordinates, where's the theta and phi in this expression? Why are they missing?

I believe the code required to plot this is something like: sphericalplot(f(r),r=0..5,theta=0..2Pi,phi=0..2Pi), but...

Why I can't rating applications in Application Centre ?

Is it possible to assign certain properties to certain variables in Maple, and have them obey those properties?

In other words, I want to work in complex numbers. I want z to be complex and to obey the rules of complex numbers. How can I declare z element of Complex and then Maple won't do complex illegal operations (or it will do them correctly). Sort of like "I" works according to the rules of sqrt(-1). Except that I is built in.

Another example would be to...

Dear all,

I am running Maple 11 on my PC. I have Windows 7 (64 bit installed), use Eclipse SDK for Java development.

I have made some mathematical calculations in Maple 11, now I want to integrate them to Java using OpenMaple API.

I viewed help, maple soft and maple primes resources ...... I found test.java example in Maple 11 directory.

I can't add classpath to OpenMaple libraries in Java.

I have Java SDK 6 installed in...