Based on an answer to a question posted on MaplePrimes, which I am I able to locate through the search system, but that I know it is recent, I am trying to calculate the parameters of a function which minimizes the result of a numerical integral. The function, f1(x), is well defined. The function f2(x) has two parameters, K and r. The integral of the square of the difference between the two function cannot be solved symbolically. Hence my plan is to use the Minimization function in Optimization to determine the values of K and r. 

The attached worksheet includes two examples - a practice example for me to become familiar with using Optimization:-Minimization for an integral and the actual problem I am attempting to solve. Note: it was only through MaplePrimes that I learned the function must be defined through a procedure. Here is what I discovered in my experiments:

* the command to perform the numerical integration requires the small "i" verion of int, not Int, i.e evalf( int( function, limits )), not evalf(Int(..)).  This seems to be inconsistent with the documentation. Can someone explain why it is this way?

* The function must be defined locally. If I try to use a globally defined function, non-numeric results are encountered. Is there a way to integrate a global function?

* For the practice problem, it works as long as I abide by the conditions in the previous 2 bullet points.

* When I try to solve the real problem, which appears to be solvable by eyeballing some graphs (included), the kernal is lost.  This is repeatable for me. Do others experience this problem?

Thank you for your attention.

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Aside: It would be useful if the output of a search in MaplePrimes could be sorted by date.

 MaplePrimes_Minimization.mw

I’m starting a large project in education for which I can see great potential in the use of the “MapleCloud”.  For many of the students, the ability to see information on their phone is a game-changer. Hence while my students do have access to Maple on their computers, they are more willing to check out a worksheet if they can view it in a browser.

Unfortunately, in the little time that I have started using MapleCloud, and sharing my work with others, numerous issues have arisen. Some examples:
  * the file system is too simplistic and can be overwhelmed easily as I add content;
  * the group sharing system is too limited – one must log on, which is not true for worksheets;
  * the display of the mathematics is sufficiently quirky that it is not easy to read;
  * the hiding of input mathematics appears not to work;
  * plots, animations and the output of the Explore function fails too frequently.

So, my questions:
  1) are you using MapleCloud, and
  2) if so, for what?
  3) And if you are using MapleCloud, do you have similar problems?
  4) Have you developed solutions that you would be willing to share.

If there is no interest, I’ll look in another direction. But if there is sufficient interest, I would hope Maplesoft notices and works to correct and improve. Some of it may be my own failing to understand Maple, but instead of overwhelming MaplePrimes with questions, I would rather converse with similar interested folks.

Is it possible to create the operator command : |x| so that it passes x to the VectorCalculus Norm function so that if I write:

>  | < 3, 0, 4> |

the result is 5?

I assume I'm missing the verb here, but how does one display the elements of a vector and an array?

I can only do it with browsing or changing the "number format". 
 

Download Vector_Display_Problem.mw

We often use the vector notation "< >" as in <x, y, z>.  However, when I use it with a function, it does not evaluate the same way as a simple list "[ , ]". 
 

The value of k is not applied in g2.  Can someone point me in the direction as to the difference between the two types of entities as interpreted by Maple?