Maple Questions and Posts

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Could some one help me to plot this population balance equation ? see the attached file Download 4968_PBE.doc
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Hi. I'm currently running Maple 10 for my project. So far I have successfully plotted 2d graphs of Re(A) vs d and Im(A) vs d. Both Re(A) and Im(A) are dependent on d. Now what I want to do is to plot a 3d graph with Re(A) in the x-axis and Im(A) in the y-axis with an independent variable of d. I can't seem to figure out how to do this with the Interactive Plot Builder and I wish I could try solving the problem by posting in this forum. I just started using Maple so any tip would be very much appreciated.
I've been asked: how do I include a mathematical expression in a plot caption without having it evaluate? An example is displaying 2(x+y) in the caption without having it appear as 2x+2y. The easiest way to do this is to create an atomic identifier from the expression in the input line. In the 2-D input line, you'll have plot(..., caption=2(x+y)). Select 2(x+y) and right-click to bring up the context menu. Then go to 2-D Math -> Convert To -> Atomic Identifier. This turns the expression into a single name. Note that it is no longer equivalent to the expression 2(x+y), even though it looks exactly like it.
Even though dsolve is great, I'm just curious as to how the "Add an initial condition" menu choice works in the Standard Mode. If I enter a simple equation like this: diff(y(x),x)=0; I would like to create the initial condition that y(0)=6. I right-click, add an initial condition and blue "reply" text comes up that looks like the IC I would enter for dsolve. However, I can't edit that IC, and it just generally does nothing. How would I go about this? Thanks, /Ivan
I have some 2-dimensional data to which I would like to fit a curve. The data is not functional, i.e. there can be multiple values of y for a given x. The curve should be continuous, but otherwise I have little idea about what form it should take. Maple provides a really nice way to plot one such curve: Statistics[ScatterPlot] with the lowess option. But I do not want to just plot the curve. I would also like to do computations with the curve. For example, I would like to compute the sum of squared residuals. What is the best way to get the curve (as a procedure, say)?

Does anyone else see the following strange behaviour in the Maple 11 plot engine?

I was acting in a Std GUI Worksheet, not a Document. (I use Maple for 64bit Linux, which may or may not matter.)

1) In this next plot below, a (superfluous?) solid triangle appears. It lies in a xz-parallel plane at y=-1, with vertices (0.0,0.0,0.0), (1.0,-1.0,0.4), and (1.0,-1.0,0.0).

plot3d(sqrt(1-y^2),x=1..2,y=-1..1,colour=red,filled=true,view=[-0..2,-1..1,0..1]);

I´ve just programed some procedures. Those procedures don´t have any syntax errors. But after the execution I don´t obtain any result, I get only the instruction to execute. Where´s the problem?
I am trying to plot a graph of 3sin(3x) that is being displayed as choppy lines. How do I get it to display smoother? Thanks, glenn
Can anyone point me to a tutorial or something to show me how to take 2 curves and rotate them around an axis to form a 3D solid? thanks, glenn
I'm trying to set my default font and type set for my documents and worksheets but can't find where to do so. Using Mac OS and Maple 11. If I turn off bold for example and hit return it turns it back on. Even tried selecting entire document content and turning bold off but still when I hit enter it goes back to bold. What gives? thanks, glenn
A colleague recently approached me with this problem: Given two sets S1 and S2 in R^3, define the "product ball" of S1 and S2 to be the set of all points in R^3 obtained as the componentwise product of a point in S1 and a point in S2. That is, PB(S1,S2) = { (a*x,b*y,c*z) : (a,b,c) in S1 and (x,y,z) in S2 }. Can Maple help me to visualize this set? For a concrete example, let S1 = { (x,y,z) : max( abs(z), abs(x)+abs(y) ) = 1 } and S2 = { (x,y,z) : max( abs(y), abs(x)+abs(z) ) = 1 } In this case it can be shown that PB(S1,S2) consists of the following eight parametric surfaces: (x,y,z) = ( s*t, 1-s, 1-t), s=0..1, t=0..1
Is there a command for obtaining "ALL" n roots of the nth root of a real or complex number in accordance with DeMoivre's theorem? For example there are three cube roots of unity, namely 1,-1/2+sqrt(3)/2*i, and -1/2-sqrt(3)/2*i
Hello, suppose I have an expression that consists of a multiplication of subexpressions involving only one variable, for example a_m(z) = a(m) * f(z) How can I retrieve a(m) and f(z) resp. separately? That is, I would like to be able to identify only those subexpressions involving that one variable in which I am interested. For instance, how can I retrieve a(m) from a_m(z)? I have tried using select( depends, op(factor(a_m(z))), m ), but is this bullet proof and/or is there a better solution? Thanks in advance, Regards, Franky.
A note added: Although the coding below is correct, it has clearly been superseeded by the following two entries contributed by acer: Entry 1 and Entry 2. As in any fairytale (even though this blog of mine certainly is not) it takes three of something (at least according to the fairytales of my fellow-countryman H. C. Andersen). Todays entry is the third and last (at least for now) in a row of three consecutive ones dealing with manipulations of indices of Arrays. The other two entries are Tip: Index an Array and Tip: Permute the indices of an Array.
3902_problem.JPG when i am using CodeGeneration for Matlab in this file, the Maple gives out this error of "Kernel connection has been lost". But when I tried other cased of CodeGeneration for Matlab, sometimes it is working well.
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