It seems as if I had difficulties understanding the
name-concept here. Using TangentLine() for determining
the tangents l1 and l2 I get into trouble. There
is no problem with the first call of TangentLine(), but
the second call fails. Is there some kind of "undefine"
to handle this?

Here is my Maple6-code, which shows my trouble:

=============================================================================
restart: with(geometry):
TestTangent := proc()
point(H3,5,0);
point(C,5,6);
circle(k,[H3,5],[x,y]);
TangentLine(t, C, k, [l1, l2]);
end:
# First call is OK
TestTangent();

[l1, l2]

Hello group,

I'm currently doing error propagation with maple for astrophysics
calculations and stumbled upon an annoying problem. Let's say I have the
definition of velocity:

with(Units):
with(Units[Natural]):
v := (xs, xt) -> xs / xt;

I have one concrete velocity p

p := v(5*yards, 9*min);
127
p := ----- [m/s]
15000

And one velocity with a variable

q:= v(var, 4*sec);
q := 1/4 var [1/s]

Now I try to add them:

p + q;

Error, (in Units:-Standard:-+) the units `m/s` and `1/s`
have incompatible dimensions

In Maple 11 I need to write define_external procedure with 23
arguments.

For example:
in .c file I have:
void myproc(int N1, int N2, ...int N23){};

and in Maple 11 I write:
test1 := define_external('myproc', N1::(integer[4]), N2::
(integer[4]), ....., N23::(integer[4]), LIB = "mylib.so");
n1:=1; n2:=1;...n23=1;
test1(n1,n2,...,n23);

After this I get an arrow:
internal limit reached: too many arguments in external procedure
definition

But if I write the same just with 20 or less arguments everything is
working fine.

Is it the way to increase memory which Maple using for define_external
procedure?

Hello group,

I've asked this question in de.sci.mathematik before (2008/01/25), but
my query didn't yield any results - so here it goes again:

I'm trying to make Maple display one digit in front of the dot
seperating the pre-decimal position from the post-decimal. I.e. in the
following example:

7
0.3089519960 10 [km]

I'd rather like maple to display 3.089519960 * 106 km instead of the
above output.

Any way to do it?

Kind regards,
Johannes

Hello group,

I've asked this question in de.sci.mathematik before (2008/01/25), but
my query didn't yield any results - so here it goes again:

I'm trying to make Maple display one digit in front of the dot
seperating the pre-decimal position from the post-decimal. I.e. in the
following example:

7
0.3089519960 10 [km]

I'd rather like maple to display 3.089519960 * 10^6 km instead of the
above output.

Any way to do it?

Kind regards,
Johannes

How can I evaluate a function at more than one point?
Evoking the function with a list of values does not work.

Thx

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

If the same bugs exists through numerous software releases,
I think that is valuable public information.

It just should not happen.

-- Brad Cooper

-----------------------------------------------------------------
-- NOT FIXED BUGS ARE DANGEROUS: THEY TEND TO GET MORE SEVERE --
-----------------------------------------------------------------

Quality of CASs is our #1 care.

So our little demo continues.... Hello again from the VM machine
which hopefully soon will be used by CAS manufacturers to the
benefit of their customers.

This example demonstrates YET ANOTHER case of bad defects in the
Wolfram Research Quality Assurance process. Consider, it cannot
trap and fix efficiently bugs the long livers.

The reported here defect persists in the Mathematica versions
since at least 1996 to 2008.

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

I would like to create inline procedures using "makeproc". Is there a
way to do this, e.g. by specifying this option together with
"makeproc"? Or is it only possible to manually code an inline
procedure?

Thanks a lot,
Rainer

Hi All,

I want to convert a lengthy (several pages) expression of trigonometry
of several angles and parameters into C++ code for numerical
calculation. I did a simplify, then edited the expression into C++. It
is not very efficient for calculation nor easy to maintain. The
resulted C++ code is not easy for human to read. What is the right
way of doing it?

I am using maple 9.52. When long expressions are displayed in maple,
The GUI is extremely slow to scroll even though I am using a 2.4Ghz
quad core with 2G of DDR2 memory. How can I improve the GUI response?

Thanks in advance.

Everett

Is there a nice way to extract an integrand; that is, if we have an
expression of the form Int(f,x) or Int(f,x=a..b) can we easily get f?
This issue arises when we manipulate Int(g,z) by changing variables,
doing integration by parts, etc., to end up with Int(f,x) in which
Maple knows f but we don't. Of course, one can always use the mouse to
extract f from the screen display of Int, but I was hoping for a
better way.

R.G. Vickson