Could there be a useful performance gain if Maple were changed so that %, %%, and %%% did not function inside a procedure (proc) body?

Should one ever use % in a procedure? Would using it just be obfuscation where none is needed, or could it serve a special purpose?

While on this topic, how good or bad would it be to use a Standard GUI equation label inside the body of a proc that was entered in 2D Math?

acer

I have been running Maple 11 under Fedora 9 Linux without problem.

Maple doesn't seem to have a trace plot feature after you've created a plot.  The coordinate readout only roughly estimates the points.  Graphically I should be able to get exact points on a plotted line or curve as I move my cursor?  This feature has to be added as a new feature in future versions.

Also I just noticed animated graphs do not have the coordinate feature. 

eval is having 2 arguments, so how to apply it to expression sequences?

eval(x=1,x=2,x=y);
Error, invalid input: 
    eval expects 1 or 2 arguments, but received 3

The usual approach is to convert an expression sequence to a list, apply eval, and then either use op, or [] at the end to convert it back to an expression sentence. Something like

eval([x=1,x=2],x=y)[];

                             y = 1, y = 2

or use quotting,

I found a bug in the Norm function. Somehow it comes up with an error when executing a noncontent variabel.

Like:

  Student:-LinearAlgebra:-Norm(a)

        Error, (in Student:-LinearAlgebra:-Norm) when calling 'LinearAlgebra:-Norm'. Received: 'expects its 1st argument, MV, to be of type {Matrix,Vector}, but received a'

Anyone know if this is going to be solved or anything to prevent it?

In Maple's Help system there is an icon to switch the Examples from 1D Maple notation input to and from 2D Math input (the default).

Why is the 2D Math form of the Help Examples in red? That doesn't match the any of Maple's interfaces' entry modes, does it? Shouldn't the input be in black, to match what appears to be 2D Math input in Worksheet mode?

Also, the 2D Math form of the Help Examples loses inlined explanatory comments. For example, on the modp1 help there is this, in 1D Maple notation...

It seems the cascade, tile etc... under the windows option only work when extra tabs from the same maple.exe are opened in a new window.  If multiple maple.exe files are started separately the cascade, tile etc... windows options are unavailable.  Not really a problem, it makes sense.  Third party programs are probably available that would force multiple windows into tile or cascaded format.

The following is strange. By acting on an equation label (in the Standard GUI) a subsequent global reference gets printed as if it were a module reference.

> restart:

> x:=ScientificConstants:-Constant(c);
                              x := Constant(c)

> ScientificConstants:-GetValue(x);
                                  299792458

> y:=:-Constant(hbar);
                             y := Constant(hbar)

> ScientificConstants:-GetValue(y...

I am using maple 13.

Regardless of the doccumentation I hunt for, the help window opens and in the main window it states "No matches found."  For instance, the ?plot and ?sign commands do not return any documentation.

This started after trying to use library tools to save and retrieve data.

I have restarted the program in a black worksheet to no avail.

What should I do, and how do I avoid this in the future?

Thanks!

Jacques,

[reply to this post]

I know a lot of the history of Axiom (having had many talks about it with James Davenport over the last 6 months), NAG, Maple, etc.

What about if, as result of those talks, you (both?) write a comparative review about the main design ideas of either system and their impact on past and future development?

This week I decided to do some research and find out the details of how to make model animations with MapleSim, by adding in CAD drawing files of the component parts. To see what I mean, take a look at this quick animated movie that shows a robot arm with five degrees of freedom:

I am using dsolve for one system from MapleSim which is five big equations by five variables after using some rifsim(it was 65 by 65), it goes for ever and after long time I see this error which is :"Kernel connection lost".

so I do not have any result by dsolve.

thanks

Hi,

I wonder how it is possible to copy a text from Maple (version 11) to another application. I can highlight the text in Maple and press ctrl+c. But for example in word the only thing I get by pressing ctrl+v is an image of the text :(

I tried scan the image with an OCR but I assume that the resolution is too bad...there are tons of recognition mistakes..

Please give me advice :)

Martin

Hi folks. I have several applications that require multivariate (usually three variable) polynomials of degree at most n in order to fit data. Is there an easy way to generate these? I have in the past just written them out, but it seems inelegant, and one could easily mistakenly leave out a term when constructing a trivariate poly of degree 7, for instance.

Thanks in advance,

John Starrett