Hi everyone,

For my research, I needed a procedure to calculate an interpolant respecting the monotonicity of the given data. The curve fitting package of Maple 11 didn't help.

I'm pasting my code below.  I hope it helps some of you too.

Cheers,

Ozgur

PS: Thanks goes to Joe Riel for his help.

I have found that once I have "ugraded" to AVG Free 8 (the antivirus of Grisoft) Maple 12 Classic GUI no longer finishes starting: the splash screen remains, the red button is on, pressing it issues "You are in the middle of a computation. Do you wish to interrupt it?". Pressing it gives me a non responsive GUI. And the task manager is required to kill the zombie proceses that remain after closing the GUI.

I'm getting the following errors when installing Maple 12: 5/28/08 3:45:47 AM [0x0-0x26026].Maple12MacInstaller[471] 2008-05-28 03:45:47.676 IAAuthentication10_4[477:10b] CFPropertyListCreateFromXMLData(): Old-style plist parser: missing semicolon in dictionary. 5/28/08 3:45:47 AM [0x0-0x26026].Maple12MacInstaller[471] 2008-05-28 03:45:47.683 IAAuthentication10_4[477:10b] CFPropertyListCreateFromXMLData(): Old-style plist parser: missing semicolon in dictionary.

It's been a while since I've updated my blog, but the recent Maple 12 release gives me a good opportunity to talk about some of the features I'd been working on for the past months. A few people on MaplePrimes had asked for more details about Maple 12, so I'll start by saying a bit about the new polar axes. A lot of this work was done by my colleagues in the GUI Group and they may have additional interesting things to say about the feature.

In previous versions of Maple, you could draw polar plots using the plots[polarplot] command or with the coords=polar option, but these were always displayed with Cartesian axes. In Maple 12, polar axes are displayed by default, as seen here.

plots[polarplot](1+cos(theta), theta=0..2*Pi, axis[radial]=[tickmarks=5])

 A number of new options were added to the polarplot command so that you can customize the axes.  The most useful ones are the axis[radial] and axis[angular] options. These work like the axis[1], axis[2] and axis[3] options available for general plots, and you can use them to control color, tickmarks and other properties of the radial and angular axes.

Typeset math on plots had been introduced in Maple 11, and now we can take advantage of this with nice axis labels, in multiples of Pi, on the angular axis. These labels appear by default, but of course, they can be customized with the axis options. The plot/typesetting help page provides information on how to add typeset math to plots through the command line. There are also interactive ways to do this, using the context menu.

You can add polar axes to plots created by commands other than plots[polarplot], by using the axiscoordinates=polar option. However, not all the options offered by plots[polarplot] are available generally. Here is an example using plots[implicitplot].

plots[implicitplot]([x^2+2*y^2 = 1, x^2+1.5*y^2 = 1], color = ["Blue", "Green"], x = -1 .. 1, y = -1 .. 1, axiscoordinates = polar);

It is also possible to get the pre-Maple 12 Cartesian axes back with polar plots, by adding the axiscoordinates=cartesian option.

The following is extracted from Jakob Nielsen's weekly newsletter on usability.

----------------------------------------------------------

While in London for last week's conference, I stopped by the British Museum. Among other exhibits, I saw King George III's collection of antique coins. Because this was part of an exhibition about the growth of knowledge during the Enlightenment period, the collection was shown in the way the King had organized it.

His Roman coins were sorted chronologically, which is the same system the Museum uses to this day. But the Greek coins were sorted alphabetically according to the name of the ruler depicted on the coin. This meant that coins issued at the same time would be in widely varying parts of the collection. It also meant that coins minted in the same city state would be dispersed across the collection. Not surprisingly, the British Museum no longer uses George III's system for its collection (except for this special exhibit).

Information architecture lessons:

1. Alphabetical order is usually a bad way to structure items.
2. For a better structure, you need to understand the underlying dimensions of interest (the King didn't know enough about ancient Greece to correctly place the coins in time and space).
3. New info may cause you to restructure things for better access.
4. Two or more structuring principles may be better than a single one.

I have uploaded a new version of the module Quantavo

It is a set of procedures (Maple module) for Quantum Optics and Quantum Information calculations in the optical Fock basis)

More can be found in this link

Any questions or feedback welcome.

I believe that the basic language in which the Maplesoft writers

code Maple is Java.  That means that the programmers at Maplesoft

had to have written TONS of Java classes, such as LinearAlgebra,

with lots of methods, such as resultants and determinants.

I would think they would have posted these Java classes into the Java library

I believe that the basic language in which the Maplesoft writers

code Maple is Java.  That means that the programmers at Maplesoft

had to have written TONS of Java classes, such as LinearAlgebra,

with lots of methods, such as resultants and determinants.

I would think they would have posted these Java classes into the Java library

Would you Try it...

http://www.mechofmat.com/examples/ex01/msetup.zip

Current Trial Serial Number
32FSXUT-BCTLFQ4-QEU3Z95-FE7ZM

 

 

 

My PC has 512 MB of RAM (Windows XP , service pack 3). Will my computer be able to run Maple 12 smoothly? Thanks!

In a previous comment, J. Tarr asks "what is Maple primarily intended to do?", and suggests that I might have something to say on the topic.

Will Maple 12 run on 256 Mb's of RAM?  The website says 512 recommended but it doesn't give a minimum.  Can't go to 512 Mb's on my old laptop, the 8100 Toshiba Tecra memory slot B is failing (can't get it to work, one fix was to push on the RAM, doesn't help)  I know this isn't the place for it but if anyone has any tips or pointers to fix the RAM slot I would greatly appreciate it. 

Back to the original question does does Maple 12 work with 256 Mb's of RAM?

I am having problems animating the trajectory of an object in 3-D. I have no problems displaying the 3-D background and the trajectory of the objects, but I can't display the background and the animation of the object's trajectory in the same 3-D plot. The plot command that I am using is:

display(Pobj,Pline1,Pline2,...,orientation=[-45,45],view=-20..20,-15..15,0..5);

where

Pobj:= animate3d(odeplot(res1,[x(t),y(t),z(t)],0..5),-20..20,-15..15,0..5,color=black,frames=50);

View 3080_Bessel_weirdness.mw on MapleNet or Download 3080_Bessel_weirdness.mw
View file details

 

BesselK(0,r)*r is being turned into something that gives wrong results.

The limit as r->0 is given as -1/2 when it should at least be positive.

 

Please see the attached worksheet above or:

Hi again

 

Seems I mostly post after an upgrade! This time I've two errors. The first is this message on startup: "Error, cannot raise the datalimit above the hard limit"

Which is meaningless to me unfortunately.

The second is the fact that I've no help files that can be accessed. Starting the old-style GUI gives a hint that the help database cannot be found but the *.hdb files do exist and in the sample location in the maple 12 install as in the Maple 11 install.

Any ideas?

 

TIA Tim