MaplePrimes Posts

MaplePrimes Posts are for sharing your experiences, techniques and opinions about Maple, MapleSim and related products, as well as general interests in math and computing.

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  • On November 22, Joe Riel posted an implicit differentiation problem that caught my attention. It took the manipulations typically learned in an Advanced Calculus course one step further, but the devices learned in such a course could readily be applied. Joe's solution was expressed in terms of exterior...

    I recently had a journal article accepted but was told that several of the graphs had to be redone because the axes were not thick enough to reproduce. Unfortunately, Maple has no way to edit the axes for thickness, so I had to export the differential equations to Matlab and integrate them there to get publication quality graphs. I have been having more trouble every year with the quality of Maple's graphics output, and this really puts a cherry on it. I would be pleased as punch if Maple could include a graph editor that would let us customize a graph to make it presentable to publishers. Maple does so many things so well it is a shame to leave this on the back burner.

    I've submitted an application to the Application Center: An Epidemic Model (for Influenza or Zombies).  This is an interactive Maple document, suitable for instructional use in an undergraduate course in mathematical biology or differential equations, or a calculus course that include differential equations. ...


    This is the Affine Scaling Algorithm outlined by:

    Linear and nonlinear programming with Maple: an interactive, applications ...
    Paul E. Fishback,Paul F. Fishback

    Wide set of expressions can convert to compiled functions. Expressions can even include definite integrals.
    Hope it helps for others who want really speedup calculations in maple as much as possible for now.

    ex.mw

     

    Checked under 15.01 version

    My daughter the psychiatrist recently shared a link with me that mentioned a factoid about Facebook: "84 per cent of people think their friends have more friends than they do".  Actually they don't just think this: for 84 percent of Facebook users, the median friend count of their friends is higher than their own friend count, according to

    The "." notation for the dot product of Vectors is very convenient and intuitive.  For example:

    > <1,2,3> . <1,1,1>;

    6

    One sometimes annoying feature of it, however, is that by default Maple is using a dot product (suitable for Vectors with complex scalars) that is conjugate-linear in the first argument.  But let's say you will only be working with real scalars.  There's no problem if your Vectors have numeric entries, but...

    Please reconsider order of messages in posts acorrding to option reply. I don't understand why my answer

    http://www.mapleprimes.com/questions/127969-Encapsulated-Transformation-Of-Expression

    ( Moments ago by to Axel Vogt) appears at the end of list instead to be in that branch where it should be.

    I also know that branch menu is completly for other purposes, not for this.

    Over the weekend I was attempting to estimate the tension change in a bicycle spoke due to an applied load.  After various simplifications and approximations, the problem was reduced to the following.

    Given a constraint, F(x,y) = 0, and functions G(x,y) and H(x,y), find dG/dH at a particular point, here (0,0). 

    The constraint, F, was sufficiently complicated that solving for either variable was not feasible, so implicit differentiation seemed the best...

     

    I have data organized in a Matrix from which I want to select a sample based on a certain (simple) criterion, e.g. no cell in the first column to be negative.

    I was quickly able to find a way to do it, inspired by a method Preben Alsholm used in a recent mapleprimes post.

    But, I wondered, is that the most natural approach? So I quickly found another approach and compared them.

    Any other suggestions welcome. Particularly methods that could...

    We are looking for someone that can develop some maple scripts for us. Must have some chemical engineering knowledge.

    contact us: smne33@hotmail.com

     

    regards.

    The following is the matter of so-called central limit theorems. We have the sum of random variables S:= ksi[1] + ksi[2] + .. ksi[n]. We know only that the number n is large, the variables are independent or weakly dependent, and each ksi[j] is small with respect to S in a certain sense.

    By the  central limit theorems it implies that S is close to the normal distribution.

    Here is the procedure which illustrates the Lindeberg-Levi theorem ( see

    For pass argument I use the ssystem command.

    So I'm able to pass argument by launching my script like this.

    login@hostname:  echo  ARG | ./example.mpl

    example.mpl look like this:

    -------------example.mpl----------------

    #!/usr/bin/maple

    with(StringTools):

    ResultArray:=ssystem("read MapleArg; echo ${MapleArg}"):

    #

    Maple 15, Windows7x64, Standard v. Classic

    I have noticed that, on my system, the smoothness of some INLINE plots is better in Classic than in Standard. Is this some regression or some installation-specific quirck I wonder?

    In Tools->Options, I have plot anti-aliasing enabled (whatever that is).

    This looks alright in Classic

    plots:-implicitplot(
      [ x^2 + y^2 = 1, x^2 + y^2 = 2 ]
      , x = -2 .. 2
      , y = -2 .. 2

    I wanted to let everyone know that we have completely revamped the Books section on our website. It is now a lot easier to browse and search for books that involve Maplesoft products. If you know of a recent book that isn’t in our database, please tell us about it.  (You can use the link at the bottom of the book section pages, or you can reply to this post).

    We would also like to hear from people who...

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