## Increase Acuracy of Plot3d??...

The problem i have is this, the plot that i am suppose to recieve is one that looks like the 'pointplot3d' below, yet i recieve something which doesn't. Any suggestions as to how to circumvent this? with(plots):Digits:=15: > Omega[0,1]:=.825352549049169: plot3d(MathieuCE(0,Omega[0,1],r*I)*MathieuCE(0,Omega[0,1],theta),theta=0..2*Pi,r=0..1,coords=ellcylindrical,axes=FRAMED); points1:={seq(seq([T/100,2*Pi*S/100,MathieuCE(0,Omega[0,1],2*Pi*S/100)*MathieuCE(0,Omega[0,1],I*T/100)],T=1..100), S=1..100)}: pointplot3d(points1,coords=ellcylindrical, axes=FRAMED, color=red, style=wireframe);

## appending text after inline output...

in document mode I like to add a descriptive text after the inline output to label what answer is. You cant just switch to text mode and start typing, it does not work. The only way I have been able to do this is to use the next float or next prime command then backspace twice to erase that output and then I can switch to text mode and append text. Is there a easier way to do this?

## New User: How Do I; -1.60x10^-19 (Coulombs)...

How do I display / calculate -1.60x10^-19 when calculating Coulombs? This returns a "Error, invalid power" in Maple 10 (student) and Classic Maple (student) and in the calculator (student).! Frustrating, Yes I am a student and a new user and I need the help the software promises to provide.

## Problems Solving Systems in Maple...

I'm trying to solve a system of equations in maple and I have no idea why it's doing what it's doing but it certainly isn't working. Anybody have an idea what's going on? View 2503_numbers2.mw on MapleNet or Download 2503_numbers2.mw
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## how to solve the differentiation in my work?...

i have a problem of my equation with differentiation,in the first i run it total OK ,but when i input the value into the equation, the ERROR was show the screen. i don't know which step have the problem in my procedure. under is my maple file,(if you can't understand what mean of this procedure,just send me E-mail). regards View 1984_new equation with water out.mw on MapleNet or Download 1984_new equation with water out.mw
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## Curious behaviour of subs/eval...

A colleague asked me about this, and I couldn't help him: ``` > g:=y+exp(2*t): > y2:=subs([y=3,t=0.1],g); y2 := 4.221402758 > subs([y=y2,t=0.1],g); 4.221402758 ``` Why has not the new value of y2 been substituted for y in this last expression? And the same thing happens for eval. Thanks, Alasdair

## Loglin scale...

I've already found the commando's logplot and loglogplot on my own. The first defines a log scale for the y axe. The second defines a log scale for both the axes. Now is my question where could I find the command for plotting a log scale for the x axe. I suspect it is something special because I could not find it in the library plots. My excuses for my terrible English! Greetz Pieter

## Collpasing Once Again...

I am trying to write a paper in which I can, for presentation purposes, collapse document blocks and have the code not shown. I am running into the problem that when I collapse some document blocks code within is not displayed but when I collpase other document blocks all that goes away is the red prompt. I can't figure out why the difference. The attached file has two document blocks which, as far as I can tell, are identical except for a few words of text. When I collpase the first block the code remains displayed, but when I collapse the second block it does not. Can anyone figure out why the difference?

## Composite plots and plotting the output from proce...

Hello, I'm wondering if it is possible to produce a composite plot in Maple. What I would like to do is: 1. Take one solution of a non-autonomous differential equation, and plot it with respect to t, call this x(t). 2. Take another solution of a similar equation, also plot it with respect to t, call this y(t). 3. Take x(t) vs. t and y(t) vs. t planes and use it to create a 3-dimensional plot containing all the points where (t,x(t))=(t,y(t)). It's difficult to describe, I hope the above is helpful. On a (hopefully) simpler note, when I solve the following: odesys := diff(x(t), t) = 2*x(t)-y(t)-x(t)^3, diff(y(t), t) = x(t)

## graphs...

hi there... im trying to plot this equation onto a graph- x-2y=4 x+2y=12 I dont knw how to put it into maple.....as maple only reads one equation at a time and not as a whole???? help please....

## Can't maple even maximize such a simple function?...

Tried to maximize a simple function f(t), failed. Converted it to different forms, still failed. Simplified the function a bit by hand and tried again, still fail. Only after some major simplification by hand and a transformation: u=s^2=(1/2-t)^2, it finally worked. I must be missing something. I thought such a simple problem should certainly be solved by maple in a flash. Can someone enlighten me please? Thanks a lot. > maximize(t^2*(1-t)^2*(1+t^2)*(1+(1-t)^2), t = 0 .. 1); / 2 2 / 2\ / 2\ \ maximize\t (1 - t) \1 + t / \1 + (1 - t) /, t = 0 .. 1/

## Converting fractures to regular numbers...

Question is easy but not for me :). How do I convert fractures into regular numbers. Thank you! Greetz Pieter