I suspect this phenomenon is related to my topic on hanging with right click on selected text, but it is more general.

I have an execution group (in a standard worksheet in worksheet mode with 2D input) with about 65 lines (when comment lines are included) and 30 lines (when comment lines are removed) . It was taking a very long time to compute after each time I changed anything in the group, but computed very quickly thereafter if I changed nothing. After some experimenting, I discovered the following phenomenon.

Is there a reason that there are not dates in the Maple 12 File Open dialog box window.  There seems to be headers for "Name", "Size" and "Modified" but on my computer, the file type is contained in this "Modified" column instead of the file modified or creation date.

Thanks,
Paul

For one (and only one) execution group (on a worksheet with many execution groups, both before and afterwards) which was modified by a student but which looks perfectly fine, a right click on any selected text causes Maple to hang (before any context menu appears). When I look at the mserver.exe process on Task Manager, it continues to use 99% of the CPU and keeps increasing its memory use.

The MapleSim Connectivity Toolbox is now available. With this toolbox, you can export MapleSim models to Simulink, including rotational, translational, and multibody mechanical systems, thermal models, and electric circuits. It creates Simulink S-Function blocks for fast execution within Simulink and real-time implementation through Real-Time Workshop.

For more information, see

Maple 11 - I'm trying to implement the explicit formulas for the three cubic solutions. I tried typing them in explicitly from other sources to no avail, for some reason or the other. Right now I'm currently using: solone, soltwo, solthree := solve(a*x^3 + b*x^2 + c*x + d): solone:=unapply(solone,a,b,c,d); soltwo:=unapply(soltwo,a,b,c,d); solthree:=unapply(solthree,a,b,c,d); The only problem is that, these solutions degenerate when the descriminant is equal to zero, for example:

Is possible to understand how to use maple 12 to input equations like this. I have difficulty in understanding the help section of Maple. I dont see the functions listed in any of the pallettes as they are in my homework.

Thank You. I appreciate your time.

1.)Find the Fourier series for the function:

  Hello,

 

 I have recently started the following error with maple on fedora 10 when I execute the classic worksheet with maple -cw or xmaple -cw I get the following error

 

maple -cw

*** glibc detected *** /home/EUIX/Programs/maple12/bin.IBM_INTEL_LINUX/maplew: free(): invalid next size (fast): 0x09af87a0 ***

======= Backtrace: =========

/lib/libc.so.6[0x7a13a4]

/lib/libc.so.6(cfree+0x96)[0x7a3356]

I wonder what virtue there would be in an "assistant" in the Standard GUI to show and allow control of the interface settings.

In the absence of a built-in assistant (or tab in the Tools->Options panels) I wonder whether a simple Maplet would serve.

acer

We are trying to create an animation of arrows, where we calculate the vertices of the arrow in a procedure.  We are receiving the error:

Error, (in peak_slow) cannot determine if this expression is true or false: t < -.4506938557
 

where the animate command is trying to evaluate our procedure instead of calculating the value.  The procedure is

I'm one of several technical writers at Maplesoft.  It's our job to craft the text in our brochures and user stories, and on our web site.  We all have differing styles, but we share a common goal; we want to write in a manner that’s technically compelling but simple to understand.

After recently exploring Maple’s string manipulation tools, I was surprised to find a command that measures the readability of a sample of English text.  It seems that as well as making you a better mathematician, Maple will poke and prod you into being a better writer.

StringTools[Readability] returns a measure of readability called the SMOG index (but, when asked, will also give the Flesch Reading Ease, Flesch-Kincaid Grade Level Formula, Automated Readability and the Coleman-Law indices).

These measures do not gauge the quality of the writing, its grammatical correctness, or account for specialized discipline-specific vocabulary. They simply use guidelines determined from in-the-field studies (largely conducted in the US) to quantify the degree of education or effort it takes to understand a sample of text.  Additionally, the calibration of the results against the required reading effort is only meaningful for readers whose native language is English, and whose schooling resembles that of the US system.

The SMOG index wins an award for the most amusing acronym of the month: Simple Measure of Gobbledegook. It's calculated with the following empirical formula.

 It returns the years of education (that is, the US grade level) required to completely understand a sample of text.  Typically, Newsweek has a SMOG index of 10 to 11, the New York Times 13 to 15, and the Harvard Law Review 17 to 18.

I was recently asked to describe MapleSim in less than 70 words; this was the result:

MapleSim is a tool for multi-domain physical modeling and control systems development.  Physical components and signal-flow blocks can be connected to create models that map onto the real system. It features an integrated environment in which the system equations can be automatically generated and analyzed, and new physical components created. It contains tools for optimized code generation, controls analysis and design documentation.

This has a SMOG index of 15.5, which implies the reader needs a university education for complete comprehension.  Since that’s the target audience, I guess I’m in the right ballpark.

As I write this post, I know I’m guilty of making many readability errors.  Are my fellow Maplesoft bloggers as guilty?

To answer this question, I used Maple to calculate the SMOG index for all the blog posts on Maplesoft.com (but first stripping out code snippets or URLs that would distort the score).  The top 10 and the bottom 10 scores are given below.

 

The Ten Most Readable Blog Posts
Rank	Title	Author	SMOG Index
1	Who Needs Math?	Fred Kern	10.2
2	China on my Mind	Fred Kern	10.8
3	Maple Goes Social (Networking)	Tom Lee	10.9
4	Top 10 things to evangelize about …	Tom Lee	11.0
5=	“Every time I walk into math class a little part of me dies”	Tom Lee	11.1
5=	India on my Mind	Fred Kern	11.1
7=	The Physics of Santa Claus	Stephanie Rozek	12.1
7=	Stringing Me Along	Samir Khan	12.1
9	A Better Tomorrow in Engineering Software	Samir Khan	12.2
10	Good Vibrations	Samir Khan	12.6

 

The Ten Least Readable Blog Posts
Rank	Title	Author	SMOG Index
30=	An Animated Discussion about Pendulums	Samir Khan	15.4
30=	Algebraic Surface Blending	Tom Lee	15.4
32	An Optimal Day	Tom Lee	15.5
33	Repaying Old Debts	Tom Lee	15.6
34	Taking the Lead	Tom Lee	15.8
36	Postcards from the road: Part 1 -- On rocket science	Tom Lee	16.0
35	Postcard from the road: Found in translation Part II	Tom Lee	16.3
37	Postcard from the road: Found in translation Part I	Tom Lee	16.5
38	Physical Modeling - Killer Application No. 2 for Symbolics	Laurent Bernardin	16.7
39	Let's Get Physical	Samir Khan	18.1

Well...it appears that I’ve written some of the most readable posts and the single least readable post.  The two least readable blog posts are those that explore abstract, high-level ideas (and hence demand more sophisticated writing), while the most readable blog posts are essentially opinion pieces.

Other than that, the only conclusion we can make is that good writers tend to write to the level of comprehension of the intended audience and the material; they don’t unnecessarily dumb down the sophistication of their writing to the lowest common denominator, or write to a level that’s beyond the scope of the material.

I’ve attached a Maple worksheet that helps you explore the readability of text using all of the measures in StringTools[Readability].  You may want to use it to write a more readable blog post than this one.

I gave Maple the command

> ?fft 

to see how to do the fast fourier transform in Maple, and I what I got was a page that told me to use the commands:

> with(Matlab)

>v:=<1,2,3,2,3,4>

>Matlab[fft](v)

 

Why is maple using matlab ??

Can the size (width, length) of a 2D plot be specified programmatically? In particular, when a document is re-executed, I would like the graph outputs of plot(...) to be automatically sized to pre-defined values, for example to fit a full page. Right now, I am having to re-size each of my plots manually. For creating a report with many graphs, this is annoying to do and leads to plots that are not always exactly the same size.

I am thinking of the equivalent of ...

> plot(x^2,x=0..2,[width=6in,height=8in])

or ...

Does any way exist to bind keystrokes to menu commands? In particular, I frequently use sub and superscripts in text (I'm doing lots of chemical formula). That I have to search to a sub-sub-menu level to make these changes for individual characters is constantly annoying. Binding specific keystrokes (ctrl-underscore and ctrl-plus for example) to change character styles would be most useful in this case.

If this is not possible to do, consider it a feature request!

--

JJW

Download int_vs_sum_for_mr.mw

Looking at the attached worksheet,

it appears that the absolute value, minus 1/2, of the integral of (-1)^x*x^(1/x) from 1 to infinity would equal the partial sum of (-1)^x*x^(1/x) from 1 to where the upper summation is even and growing without bound [0]. Is anyone interested in improving or disproving this conjecture? 

 

I need to understand how to solve de with maplesoft using laplace. find the transform of the function sin 3t + 3t cos 3t. If I use the table, then I don't know how to enter the equation in maplesoft Thank You