Unanswered Questions

This page lists MaplePrimes questions that have not yet received an answer

Hi,

I would like to instal Maple 9.5 in my laptop, once I already have some few programs for his version. I don't know how much cost Maple 9.5, and how do download it. 

I live in Brazil.

Thanks in advance.

Carrijo.

jose.carrijo@gmail.com

Hi.

in the ThermophysicalData[Chemicals] package that compute the coefficients for different species how I can find that coefficients for seven coefficients not nine of them

in other words, I am seeking to find Databases for the NASA Seven-Coefficient Polynomial Fits for Calculating Thermodynamic Properties of Individual Species.

Best

How do I use to compute d(logS(t)) and use this to find the closed form solution of S(t)

Hi

I have the following of fractional of ode system.

.How to solve it by maple.

Professor Robert J. Lopez is a Maple Fellow and the author of many Maple webinars and applications. He is also co-author of a book entitled Discovering Calculus With Maple, which I have recently acquired, and which turns out to be keyed to Maple V Release 3 on a Mac. Well, I have Maple 2020 on a Mac. What is the best way to get this book to work for me?  Thanks very much.

Hello, 
I have this problem to my system:

sol := pdsolve(sys2, {bcs, ics}, numeric)
sol:-plot3d(u1(x, t), x = 2 .. 3.2, t = 100 .. 1000)
Error, (in pdsolve/numeric/plot3d) unable to compute solution for t>HFloat(0.0):
unable to store HFloat(undefined)+HFloat(undefined)*I when datatype=float[8]

It is 1 pde and 1 ode.

What can I do to solve it?


Best
 

Hi

I am trying to construct a controler for a UR5e robot, I have a simulation of the robot in maplesim and have started to look for a way to use multibody analysis to provide me with the Jacobian. However it only provieds the constraint Jacobian and as I have no position constraints on the robot, it returns nothing.

I then came across 

Link: https://www.youtube.com/watch?v=d3xJge_09E0&t=374s

However it is old and does not exactly say how to do it.

So I thought I should ask this wonderful comunity if they have an recomended way to construct the Jacobian from a maplesimmodel? I am still a beginner at maplesim and maple so any help is appreciated.

 

With thanks for helping me

Eric Ragnarsson

 

Is it possible to develop a code for base excitation problem where excitation data is of earthquake acceleration?

p.s. There are 12000 data available in EQ file.

Hello Everyone,

I am currently trying to tidy up my worksheet and hide all of the script/code that I wrote in the Maple 2D-Math within the execution script of buttons etc.
Was going well so far until I started transferring code where I was using a lot of symbolic math (if I understood correctly)
There is one instance where I have a variable chi which equals x divided by a.
a being a number, e.g. 5000, while x is and remains a variable.
No problem in 2D-Math as the unknown x is dragged through all following equations.

Not so in the code editor, I think. Doing the calculation results not in x/5000, but in this:


It keeps getting worse because this term will be derived, assembled into a matrix, etc. where the expressions are getting ridiculous:


Without getting into the details of what my script should do, I believe this is a very general issue, not specific to my code.

Is the code editor / "Code when Used/Clicked" not capable of symbolic math? Oder is there some setting that could potentially help me?

Best Regards,
Lennart
 

Hi,

I try to build a trigonometric circle with particular values Pi/6,Pi/4,Pi/3, but I find that the coordplot command with its options do not react .

Ideas ? Thanks

CercletrigonométriqueMaple.mw

I'm using Maple 2020 in Linux (Ubuntu 20.04). The screen resolution is 2560×1440, so I have system-wide setting of 200% scaling for all apps, but unfortunately Maple doesn't adopt the system setting and UI elements are tiny. To make it tolerable, in "Tools - Options - Interface", I've set Default Zoom to be 200% and checked the box "Large toolbar icons". However, menus (File, Edit, View etc.) and dialog boxes are still tiny.

Am I right that the Maple GUI is written in Java / Swing? I've heard that Java 9 has better support for high dpi scaling. Does the default Maple installation use Java 9?

Dear All,
I want to solve a highly nonlinear equation in one variable. The equation includes some undetermined parameters. The running time is long in serial programming. Can I help me to execute the following command in parallel? I know that the ‘solve’ command is not thread-safe.

solve(Eq1, beta);
 
 Let me know solve the problem, if the number of equations is larger than one, as below:
solve({eq1,eq2,eq3},{beta1,beta2,beta3});
Best wishes

Hello experts,I need your help to obtain the solution of the mentioned equation in the attached picture by using the newton method by supposing the random value of involved constant like D  etc. I need an algorithm for the newton method for the mentioned equation. note h=1+x^2/2

Hi

I am trying to create a simulation of a UR5e, I have added a spring dampening systen in order to simulate the imput of external forces and torques. However I get a strange error for which I could not find an awnser for on the web.

The closest was 

https://www.mapleprimes.com/questions/203860-Compile-Maplesim-Model-To-Ccode

However it is quite old and not entirely a match. 

I get the following output

More information

Maplesim 2020

64 bit version

Windows 10

RAM - 16 GB

Do anybody know a solution for this?

Mvh

Eric Ragnarsson

 

Hi all,

There is issue with modp1(('Embed')(...)) function.

Please look at the file:

bug_embed.mw

As you can see in lines 1, 3, 5 Embed function in combining with Constant cutting several digits from argument.

Thank you.

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