# Items tagged with bugbug Tagged Items Feed

### grrrr: convert(binomial, GAMMA) and...

July 18 2010 by

0

1

restart; interface(version);  Classic Worksheet Interface, Maple 12.02, Windows, Dec 10 2008 Build ID 377066
B:=binomial(x,k)/binomial(-x,k);
convert(B, GAMMA);simplify(%);% assuming x::integer;
                                  0
#but

### Optimization workaround for Operator...

July 14 2010 by Maple

9

2

There is a probem in the Optimization package's (nonlinear programming problem) NLPSolve routine which affects multivariate problems given in so-called Operator form. That is, when the objective and constraints are not provided as expressions. Below is a workaround for this.

Usually, an objective (or constraint) gets processed by Optimization using automatic differentiation tools ...

### right panel contents stored in search...

July 04 2010 by

0

4

If you search for a phrase which matches (fully or partially) the title of a post A, then the search results will contain every other post which the search engine recorded while post A was listed in the right panel.

In other words, the search engine recorder is picking up  the right panel (latest titles, per forum) displayed while viewing other unrelated pages. So lots of other pages get inappropriately connected to all the keywords or phrases in those latest titles.

### grrrrrrrrrrrrr: int(x^x)

June 29 2010 by Maple

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  restart; interface(version); Digits:=14;    Classic Worksheet Interface, Maple 12.02, Windows, Dec 10 2008 Build ID 377066  f:= x -> (x+1)^(x+1);  simplify(int(f(x),x)):   F:=unapply(%,x);                                        (x + 1)

### grrrrr ... convert( Psi, Sum )

June 17 2010 by Maple

3

3

  restart; interface(version);  Digits:=14;  Classic Worksheet Interface, Maple 12.02, Windows, Dec 10 2008 Build ID 377066                             Digits := 14  Psi(1/8):   %=convert(%, Sum); # compare the FunctionAdvisor as well ...  evalf(%);   ...

### simple procedure won't work... not sure...

June 11 2010 by

0

7

Below is a small tidbit of code that operates on the matrix vel and updates its values.  When I check the values of the indices in the matrix, every single element, barring vel(1,1), vel(1,2), and vel(1,3), is equal to 0.

vel := Matrix(3, 241, datatype = float[8]);

step := 0.1;

vel(1, 1) := 5; vel(2, 1) := 95; vel(3, 1) := 3;

UpdateAllVelocities := proc (i, vel::Matrix, accel::Matrix, step);

#I understand these calls are quite pointless......

### Style Guide 2DMath problems

June 11 2010 by Maple

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1

Are the following paragraphs from the new Mapleprimes Style Guide supposed to contain marked up 2DMath or interpreted Maple result, because right now they don't.

See http://www.mapleprimes.com/help/styleguide

"For example, if you enter <maple>x^2/y^2</maple> you will get this image: x^2/y^2Any Maple syntax will appear, so you can get complicated and enter this: <maple>sum(cos(x^2)/sin(exp(y)),x=1..infinity)</maple>which then appears as this image: sum...

### Is Histogram default still displayed...

June 10 2010 by Maple

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In all versions prior to and including Maple 13 the Histogram default incorrectly displays the data.  Has this been fixed in 14?

eg.

a:=[1,2,3,4,5,6,7,8,9,8,9,7,6,5,4,2,2]

with(Statistics):
Histogram(a,frequencyscale=absolute,binwidth=1)

Clearly the...

June 09 2010 by Maple

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I just finished submitting an SCR: the link to spec_eval_rules at the bottom of the ?procedure help page doesn't work in the Online Help (it works in Maple itself, though). And I can't get ?spec_eval_rules to work directly, either, in the Online Help.

Also I was wondering, how about a badge for a certain number of SCRs?

### series add assumptions on x

May 20 2010 by
convert(LambertW(x),Int):
series(%,x):
x;
x~

Originally x, renamed x~:
Involved in the following expressions with properties
-LambertW(_Z12,abs(x)) assumed RealRange(-infinity,Open(0))
-LambertW(_Z18,-abs(x)) assumed RealRange(Open(0),infinity)
-LambertW(_Z20,-abs(x)) assumed RealRange(Open(0),infinity)
-LambertW(_Z22,abs(x)) assumed RealRange(-infinity,Open(0))
-LambertW(_Z24,abs(x)) assumed RealRange(-infinity,Open(0...

### hm ... convert / strange behaviour

December 13 2009 by

0

3

  restart; interface(version);
Classic Worksheet Interface, Maple 12.02, Windows, Dec 10 2008 Build ID 377066

# intended to be used for Reals
p:= y -> PIECEWISE([-1, y < 0],[1, 0 <= y]);

{ -1        y <...

### equation label side-effect

September 03 2009 by Maple

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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...

### saving localness

September 03 2009 by Maple

2

0

Not all objects can be saved to .m and retrieved sucessfully in a restarted or new session. This is the case not only for "escaped" locals, but also for some objects implemented as function calls of a module member.

> restart:

> t := ScientificConstants:-Constant('c'):

> type(t, specfunc(anything,ScientificConstants:-Constant));
true

> ScientificConstants:-GetValue(t...

### subliteral subscript

June 18 2009 by Maple

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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...

### grrrrrrrrr ... integral over arctan/rati...

January 15 2009 by Maple

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  restart; Digits:=14;     # using Maple 12.02  J:=Int(arctan(z)^2/(1+4*z^2),z=0..infinity);  evalf(J);                           0.40325004753375  value(J); evalf(%); Re(%);                ...
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