MaplePrimes Commons General Technical Discussions

The primary forum for technical discussions.

I have been advised to remove the older version before installing the new version, but I seem to recall that installing the new version while the older one is installed will upgrade configuration files to the new version. I'd also like the capability to be able to run earlier versions of Maple while I am checking out the latest version...is it safe to install multiple versions on the same Windows system?

Thanks,

Rich

I have noticed that for 3d plots with a lot of info, when I export them to eps format and subsequently view them, say with adobe acrobat, the figure is filled in sort of from the back to the front. There are points in the rear of the figure (or what was the rear in the original) that are subsequently overwritten by points in the foreground. Thus, it seems that exported eps of 3d Maple plots have some sort of 3d info in them.

hi to all here in this site..i just wanna ask  about algorithms..hope you can help me..

i need your help and evaluate our new develop algorithm if our algorithm is valid or not in terms of sorting numbers and characters. and as claim a fatest to sort..

whoever wants to evaluate our new algorithm,please email this: abegail_228710@yahoo.com..i look forward for the people wants to help us..

I have defined a sparse matrix and verified that it is space by using the command- sparsematrixplot(Kd,'matrixview');

first, is there another way to check wether the matrix is stored in the sparse form?

second, when trying to sovle an algebraic set of equation using the procedures for hendling the sparse matrix i encountered the following error:

Error, (in HWcall[1]) column vector dimension less than length of sparse data
 

what is the meaning of this error and how can I repair it?

Dvir

Maple 13, Mac OS 10.5.7 It seems that when choosing export from a menu (for example to export a graphic), I get as the default directory not "currentdir" (which the user can change) but "homedir" (which the user cannot change). True? Some rationale for this?

I just noticed that in Maple 12 (and 13) the Layout palette's subscripted atomic identifier entry had its hover-over tooltip changed. By hover-over I mean the text based tooltip that appears after a slight delay when the mouse point is allowed to hover over the entry.

In Maple 11 it showed as subliteral which, while perhaps to entirely clear to everyone, was at least accurate. It meant: the unique subscripted name.

For example, x-subscript-y, as a subliteral...

I have a passing acquaintance with Maple 12, and looked forward to Maple 13 to see what improvements there might be. I began by creating a document based on a style that I created in Maple 12. Maybe that gives rise to some of the questions highlighted in this document. Does anyone care to comment?

If I enter an equation label (crtl-space-L) twice in a row with an operator and without any spaces, Maple shoves the second label in before the operator.

So if I want this (1)+(2) what I actually get is this (1)(2)+ looks like it's doing some commutative quantum wierdness haha sorry I just had to put that in there.

The following computation crashes Maple 11 (maplew):

> sqrt(5);
sqrt(5);                (1)

> (1) / ((1) + 1);

where (1) is a label.

Yury

 

 

I've found a small bug, it's more of an aesthetics issue.

A:=P*(1+r/100)^n;

P:=100;

r:=5;

evalf(A);

100. 1.050000000

 

No brackets around the 1.05.  Happens in classic version as well. 

 

I am currently using Maple to deconvolute gamma ray spectra, using Howards method of finite extent and non-negativity. Although this method does work well, I would like to try deconvoluting these spectra using the method of maximum entropy., Unfortunately however, I am having considerable difficulty in finding the necessary information, that would enable me to develope a worksheet to perform this task. As a result of this, I would to hear from anyone who has any experience of this method of deconvolution.

Maple 12 fails to factor this polynomial factor(x^8-8*x^7-20*x^6+232*x^5+126*x^4-2200*x^3-836*x^2+6776*x+4403); Because I knew the zeros +/-sqrt(2)+/-sqrt(3)+/-sqrt(6) I could factor it myself. One factor is x^4-22*x^2-48*x-23 Just what are the limitations of factor? I saw no hint on the help pages? At what degree does it start to fail? Surely it can handle degree 3 always--but I guess not 8. So where does it start to give up without warning (as above). Is there a built in test for irredicibility (since factor can not be used as one)?

Cool trick I never knew.  Pressing CRTL + (any number) changes the font size of the whole worksheet.  Very cool.

Couple of annoying things maple does.  When declaring variables, for example K:=45; D:=400; A:=23; Maple returns 45, 400 and 23.  Why doesn't maple show what numbers are assigned to what variables?

Also x:=t->5*t^2-5*t  only returns t->5*t^2-5*t   when what it should show is x(t)=5*t^2-5*t  Maple again doesn't show the variable. 

Consider routine A in the library, which is called by routines B1, B2,..,BN.
Then, any change in A affects, potentially, the behavior of all of them. And
B1 is in turn called by C1,...,CM, which are also, potentially, affected, etc.
But there may be routines in no way, directly or indirectly dependent on A.

Is there a way to trace the sectors of the library dependent or independent of
a given routine?

 

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