MaplePrimes - Maple 13 Posts and Questions

I am attempting to set up a loop for a summation, but result is always zero!

leslieglasser — Fri, 11 May 2012 04:22:08 Z

Problems in creating program

aisu25 — Tue, 08 May 2012 10:07:20 Z

Hello,

we have to create program which shows chemical concentration changes, but this concentration depends on time and distance along the longitudinal axis. So we have to put numbers into the left side 41x41 matrix from 3 equations:

A:=1, B:=1,E:=0.2, Δx:=0.25,Δt:=0.025.

first when i=0;

drunken sailor random walks

Jim — Mon, 30 Apr 2012 18:12:24 Z

i want to write a program to simulate a walk of a drunken sailor who walks out of a bar at the centre of a city. the city has a regular pattern of 24\24 square blocks. the sailor doesnt know where he is going and how to exist teh city. the question is how many blocks will he have to walk to exit the city?

let him start at the centre of the city and assume that he exists the city when he reaches either north, east, south or western borders. it can happen that he wlks...

Maple 13 and ubuntu 12.04

lasleandro — Mon, 30 Apr 2012 13:43:05 Z

Is someone else noticing that the last ubuntu update (12.04 64 bits) is crashing some maple 13 commands (like asympt)? In the 32 bits version of 12.04 and in ubuntu 11.10 or windows 7 (both 32 and 64 bits) commands like "asympt(3x/2 + 3/2, x)" works fine, but after update it fails...

stepwise solution of a summation

Auliver — Tue, 24 Apr 2012 20:09:55 Z

I've been trying to work out an algebraic expression for the following summation

, entered as S[n,t]:=sum(f,k=0..n-1); (with f:=k!/(k+t)!;)

I entered the above Maple expression into Maple (13) just so I could check out some small example summations I had. Maple's arithmetic, accuracy and speed is much superior to mine!...

Polymer simulation

Mayibongwe — Sun, 22 Apr 2012 18:27:21 Z

Hi! I need help with my project I dont know where to even start!

Question:

Consider a simple polymer , which consist of long chains of simple molecules attached to each other, e.g:

....-CH₂-CH₂-CH₂-...

If the interaction energy between consecutive sections ca be ignored or is low enough, the chain can be bend around at varios places to form varios configurations. One can start by fixing the first section...

plot a rectangular matrix

amrramadaneg — Sun, 22 Apr 2012 10:29:45 Z

Hi everyone

Is there a method in maple to plot a rectangular matrix.

Amr

How To Make Startup Code Stick

andrewfortune — Mon, 16 Apr 2012 10:17:24 Z

Hi,

If I click on the "Edit Startup Code" button, key in "with DEtools;" (sans quotes), save it and close the Startup Code dialog, the "Edit Startup Code" button in the toolbar is filled (indicating startup code).

If I then close Maple and re-open it the startup code is gone.

As I thought that the startup code was for all sessions, I am wondering what I am doing wrong.

Any help appreciated.

regards,
Andrew

Maple Portal Locks Up

andrewfortune — Mon, 09 Apr 2012 02:08:04 Z

Hi,

I am using Maple 13 under Windows 7. I have been using Maple for quite a while now, and all of a sudden Maple has decided to start playing funny games.

Whenever I go into the Maple Portal and click on one of the hyperlinks, the Maple session locks up. The first time this had happened, I had been in the Maple Portal for half an hour.

It doesnt respond to any clicks, including trying to close the Maple window. The only way to close it at this point is to crash it via the Task Manager....

Problem With File Open Dialog

andrewfortune — Sun, 08 Apr 2012 02:43:44 Z

Hi,

I am using Maple 13 (hoping to upgrade soon) under Windows 7.

The open file dialog looks a bit weird, as per the illustration. Is this a known bug, and has it been fixed up in subsequent versions of Maple ?

thanks,
Andrew

Built-in function to return an equation for inputting two points

p4aul — Sat, 07 Apr 2012 00:55:37 Z

Maple 13

hmm... I don't really understand the diference between a question and a post, but here goes.

I homeschool my two grandchildren in the 8th and 10th grades. they are not taking calculus or precalc yet. Lately we have been studing systems of equations. what I used to call simultaneous equations. We find the x-y intercepts and plot them. We also work backward and find the equation from the intercepts.

My question is this: Is there a built-in function such as Built-in-Function([0, 4...

plotting matrix

amrramadaneg — Wed, 04 Apr 2012 13:16:39 Z

Hi everybody,

I have a matrix A=[a[ij]] MXM,

two vectors X=[x[i]] Mx1 and Y=[y[i]] Mx1

I want to plot the following

a[11] with x[1] and y[1]

a[21...

Piecewise function is not making a function

anishtain4 — Tue, 27 Mar 2012 09:30:50 Z

I have two list, x1 and d, I want to make a piecewise function out of them and plot it, but I may have some other stuffs like this so I decided to write this procedure in a proc, the proc makes the input of the piecewise right, but when I want to make a function out of this and pass it to plot this does not works properly, I tried something else; first assigned a seri to a variable and passed it to the piecewise to make a function out of it this does not works either, but when...

two questions about maple

maple fan — Mon, 19 Mar 2012 07:22:58 Z

1.how to plot a equation include two complex variables?

e.g.,0.1501071588582623569e-19 * s1 ^ 2 - 0.1770422954406499377e-11 * s1 ^ 2 * s2 ^ 2 + 0.1526369514180028298e-19 * s2 ^ 2 - 0.8979700309848614490e-12 * s1 ^ 4 - 0.9507487955845430138e-12 * s2 ^ 4 + 0.4941234607542336257e-4 * s1 ^ 4 * s2 ^ 2 + 0.5029096170369867504e-4 * s1 ^ 2 * s2 ^ 4 + 0.1631266049971375518e-4 * s1 ^ 6 + 0.1557291987414385136e-4 * s2 ^ 6 - 0.3925287034197085366e3 * s1 ^ 6 * s2 ^ 2 - 0.5855115617172747465e3...

fsolve failed or something else ?

hermitian — Fri, 16 Mar 2012 19:50:10 Z

Hi,

I've given this problem (not exactly in this form though- therefore this is not giving the same problem again) in this forum months ago, and got a valuable suggestion.

Now, I want to take a different approach for the solution, I want to use root finding (say, fsolve ). Can anybody please tell me why the fsolve isn't working, how I can fix it ?

If possible, please send me a worksheet.

The problem is -------