I just wondered if there was a similar rule for sine.

I have the system of two difference equations. I need to plot phase plane of (x(k), y(k)).

Dear Maple users

I have encountered a strange problem when trying to make inline evaluations in Document Mode. The shortcut Ctrl+= does work on my stationary Windows XP machine, but does not work on my notebook running Windows 7 (64 bit).

To make it clear: I change to Math Mode using the F5 key, type the expression and hold Ctrl and Shift key down and press the key with the = sign. And Yes, I am using Document Mode!

When I rightclick in order to use...

  We have two random points A(X1,Y1,Z1) and B(X2,Y2,Z2) in the unit cube, ie X1, X2, Y1, Y2, Z1, and Z2 are collectively independent random variables uniformly distributed on the interval [0,1].
  How to find  the mean of the distance between A and B with Maple? The same question in higher dimensions.

Hope the following statistics is of interest for the Maple community. Here are some data concerning the numbers of downloads of unlicensed copies from one of Russian torrents (see scrn1.doc , scrn2.doc , and scrn3.doc):
Maple 14 - 11.427
Mathematica 7 - 21.137.
In fact, the quantity for Mathematica 7 is  a...

This is a continuation branch of the thread "cut/paste" won't work..." See point #1 below.

1. Why won't #$%^ Mapleprimes editor let me reply to the original post? I press "add comment" and I get pointed back to the branch two steps back. Anything I write comes out blank when I submit, so now there are two blank replies credited to me! Does that give me points I don't deserve?

2. Classic worksheet isn't "still there". It says so in the readme that classic worksheet...

Trying to navigate the MapleSoft website - my laptop died but was under warranty by HP, so now I have a new motherboard with a new HostID - so Maple 14 student won't run any more.  I seem to remember there is a way to get this dealt with, but I cannot find it on MapleSoft.com and I have homework due!!

I have a worksheet that I want to close from within the same worksheet.

Does anyone have any ways of doing this?

I had hoped there might be something to do this in the Worksheet package -  but that's not really what that package is designed to do.

I can imagine something that raises a sufficiently problematic error code that causes the worksheet to kernel connection to be lost, but don't really know how to go about doing this in a reliable and nondestructive way.

Maybe there is a way to issue a system (or ssystem) command to kill the appropriate process? This would need to be sufficiently robust as to work for Windows, Mac, Linux, and Unix - as well as any other supported Maple platform.

Has anyone ever done this? If so, how did you do it?

Thanks in advance,

The ability to color a 3D plot using a color function is geared more for functions of x and y only.

But quite often, the surface or pointwise 3D position of the plot is itself being specified as a height z which is a function of x and y. For the plot3d comand, that's pretty much the way it works (whether using an expression or a procedure).

So, of course, the very same rule that...

Heat equation using piecewise conditions in Maple produce (unwanted?) oscillations at the transition.  Not sure if this is normal or a side effect of using a piecewise boundary condition in the equation?

I came across a slide presentation for the heat equation having Neuman conditions using a piecewise boundary condition and I thought I would apply the example to Maple.  The piecewise nature of the boundary condition in Maple causes oscillations at the transition...

hi,

how i could plot the above equation in a specific range of tau and Tau when all the other parameters all also a function of these two variables?

Hi,

I want to optimize an integral of the form     over the parameter y. A closed-form anti-derivative (wrt to x) for F(x, y) is not necessarily known, so I don't mind non-exact results obtained numerically. Is there a way to accomplish this in Maple?

Thanks so much for your great answer!

x,y and z in my equations are not the XYZ coordinates, x represents the number of healthy cells, y represents the number of infected cells and z represents the number of immune cells. Here I wanted to show the phase portrait of healthy cells vs infected cells with field arrows.

Cheers,

Masoum

Hi there,

I just wonder if we can plot phase plane with arrows for more than 2 equations in Maple. For example:

DE:={D(x)(t)=y(t)-z(t),D(y)(t)=z(t)-x(t),D(z)(t)=x(t)-y(t)}

DEplot(DE,{x(t),y(t),z(t)},t=-2..2,[[x(0)=1,y(0)=0,z(0)=2]],linecolour=black,stepsize=0.1,scene=[x(t),y(t)],arrows=small)

This one doesn't give me a plot with arrows.

Thanks in advance for your assistance.

Regards,

Masoum

I am working on solving a very complex differential equation.  I believe I have a solution and am currently trying to check the solution I have to see if it is correct.  the method I am using right now is to assign all of the derived expressions to variables and then ask Maple if my solution satisfies the differential equation.  That is to say, I do something similar to the following:

x := solution :