Hello All 

I looking to write Maple code procedure to solve this equation 

restart;
with(PDEtools):
with(plots):
with(LinearAlgebra):
pde := diff(psi(t,x),t,t) - diff(psi(t,x),x,x) + V(x)*psi(t,x);

where V(x)->x^2;

I have to use this stencil 

u[i+1,j]=-u[i-1,j1]+(1-1/8*h^2*v[i-1])*u[i,j-1]+(1-1/8*h^2*v[i+1])*u[i,j+1]; where i is spatial step and j is time step

Thanks 

 

Hello,
I have a question concerning the change of the results of Maximization procedure and it will be much appreciated if you could help me.
The case is: I need to find the maximum of a function (call if f(t)) given a range of values of another function (call it g(t)).Both sets of parameters are the same. I use "Maximize" command, but I need to plot the the results on (f,g) plane afterwards. How could I change the Maximization output in order to have only objective function...

I would like to take the sin of a procedure, but it keeps giving me an error. Is it possible at all, or should I rewrite it into a matrix?

like this: sin(proc(x)...end proc)

Hi, Everybody:

 

It is possible to fin this result with Maple:

Factor[18*R*r - 3*s^2 + 9*r^2] - >  3*(3*r^2 + 6*r*R - s^2)

 

i.e. factoring at least integers terms?

 

Thanks in advance

C.L. 

 

 

A peculiar consequence of the "smartview" of plots see updates Maple16 (plotting) is that the plot of a constant function only shows the rounding errors:

plot( arcsin+arccos, -1..1 );

Obviously Maple doesn't automatically simplify arcsin(x)+arccos(x) to Pi/2.

How do i "show region ranges" on mac. on windows you just press F9 but you cant on mac??

Hello,

 

Maple_-_Upload.mw

See the upload for my worksheet.

 

When opened: Combine the first picture with the second picture and you will get the third picture, where the green filled box is a 'safe zone'. Now what I want is to find the intersection between the green line (=0.7) and the red line (the curve), which gave me two answers, as I wanted! No problem at all.

 

Now when the fourth picture is combined with the fifth picture this results in the sixth picture. So again I tried to find the intersection between the two lines (this time the green line with the blue line; I just name it to be sure that the idea is clear). But this time Maple doesn't give me the points of intersections. How come? I think it has something to do with the procedures, but I can't figure out what it exactly is.

 

I hope someone can help me out on this.

 

Thanks,

Frank

 

The solution to the following differential equations results in empty brackets [] and I want to know their content

> Restart; ode := B*(x-1)^2*(diff(y(x), x, x))+C*(x-1)*(diff(y(x), x))+(A-x/(x-1))*y(x) = 0;


> dsolve(ode);

y(x) = _C1*(x-1)^((1/2)*(-C+B-I*sqrt(-B^2+(2*C+4*A-4)*B-C^2))/B)*hypergeom([], [(B+I*sqrt(-B^2+(2*C+4*A-4)*B-C^2))/B], 1/(B*(x-1)))+_C2*(x-1)^((1/2)*(-C+B+I*sqrt(-B^2+(2*C+4*A-4)*B-C^2))/B)*hypergeom([], [(B-I*sqrt(-B^2+(2*C+4*A-4)*B-C^2))/B], 1/(B*(x-1)))

i have been given the simple assignment to sketch the region consisting of points whose polar coordinates satisfy the given coordinates:

 

2<r≤5,   (3*Pi)/4<θ<(5*Pi)/4

 

 

i know how it is supposed to look, but how do i plot it?

 

I have been playing around with the polarplots function for a good hour now, but with no luck

 

Thank you for the help

Hi, I’ve recently begun using Maple 16. I just discovered a problem when trying to open my saved files. I can’t open them directly form the folder where they are saved, I get a Message saying: File XXX.mw could not be found, please select another file. I can accsess the same file through the recent files form within the application.

It is not a shortcut, but the original file I'm trying to open.
If it matters, I'm using windows 8 

Dear Maple's expertise 

Here is the code in simple way with the output. 

The peoblem that I am calling the procedure with the same input but from time to time it gives different output shown in bold below. Although I make  restart for Mape?Is it bug in maple??Any Suggestions please.Should make clearing for some varibale and how?

 

Thanks in advance

The code is

> restart;

> Chisqr1 := proc (w...

Hi:

I have a problem in calling a procedure. The problem that the code is working perfectly when I use it without precedure, but when I wrap it with a procedure and call the procedure I get like this problem   

Error, (in Chisqr1) invalid input: `convert/Matrix` expects its 1st argument, M, to be of type {Array, Matrix, Vector, array, list}, but received Concatenate(2, Determinant(Transpose(Jacobian([(16759.00586-A-C)^2+(19630.75977-A-4*B-C*cos(32...

Hi,

I'm very new to Maple and need some help.

I have a Matrix with the structure

M:= Matrix([[2013-08-13T00:29:24+0000,"text1"],[2013-08-14T00:29:24+0000,"text2"],[2013-08-15T00:29:24+0000,"text1"],[2013-08-16T00:29:24+0000,"text1"]])

 

and would like to plot this. Now problem one obviously is, it contains a timestamp. How can I use this in Maple? Second problem is, "text1" is a string, so I cannot use plotlist because it can not be converted to a float.

If I have spreadsheet data, x and y (velocity and time), I need to find distance.  I see numbers of ways to do this, however, I wonder what people would suggest as the fastest / easiest way.  I'm not needing a function really, just results.  Does Maple have tools to simplyify this process, and if not, what process(s) might yield results of determinable or selectable accuracy.  I will have many sets of data in the future that need to be manipulated...

Hello,

I would like to assign a value I got from using the command 'Maximize'. What I gained as an answer is of the following form:
test:=[1234124, [t=124124124]] 

Now my point is to assign both these values to variables, which I can do for the first like:
first:= test[1];

But I just can't find out how to assign the second value.
I was trying it out by using the command 'rhs' but that doesn't work (although, not for me).

Probably a silly question, but yeah..thanks for a reply.

Frank