Hello!

I´m Trying to do numerical integration for a function defined by a product of characteristic functions. I either receive the message " Error, (in unknown) too many levels of recursion " or "error, (in evalf/int) unable to handle singularity". What should I do?

f_1:=(x,y,z,w)->piecewise(x+w > 0 , 1);

f_2:=(x,y,z,w)->piecewise(x*w - y*z > 0,1);

f_3:=(x,y,z,w)->piecewise((x+w)^2 - 4*(x*w - y*z)<0,1);

prod:=(x,y,z,w)->f_1(x,y,z,w)*f_2(x,y,z,w)*f_3(x,y,z,w);

I want to integrate prod, with all four variables ranging from -1 to 1.

Thank you, Bernardo

Hi, I am trying to call a Matlab function from Maple. The Matlab function requires 33 input variables, but when I call this function with this many variables I get the following error message:
"Error, (in ExecuteCommand) Matlab command string is too long"
My objective is to maximize this function using GlobalSOlve but first I want to just call it. I would appreciate if someone can help me with this.
Cheers
Saqib

Hi!
I have a two part question:
I am plotting a matrix as multiple graphs: column1 v column2, column1 v column3 etc
I have a worksheet set up so that some of the graphs can be completely equal to 0. I am plotting all the graphs on the one set of axes for comparison, and so the null graphs don't appear. However, I am having problems getting a legend. I only want to display a coloured legend (each plot is a different colour) for each graph that is non zero. How can I do this?
Second part, I have created a text box next to the graph that displays the names of the non zero graphs as strings. Can I make these strings the same colour as their respective graphs?

I was trying to generate a derivative of randomized order in Maple T.A.

It seems impossible to me since the $ in the Maple syntax of

diff(function,x$n)

and the $ in the Maple T.A./brownstone syntax needed to denote a variable are incompatible.

Coding, for instance,

$n = range(2,5,1);

$function = maple("diff(x^5,x$($n))");

or

$n = range(2,5,1);

$function = maple("diff(x^5,x$$n)");

in the algorithm section makes Maple T.A. complain about a syntax error immediately

Coding

$n = range(2,5,1);

$function = maple("diff(x^5,x$n)");

leads to

jvm 1 | To Maple --> diff(x^5,x2)

being passed to Maple (taken from wrapper output).

Hi everyone!
I would like to create a worksheet witb multiple worksheets, and I would like to use sections and subsections. Can anyone please tell me how to lock certain sections/subsections closed so users cannot open then?
Thanks :)

Hi everyone! Does anyone know how to get Maple to automatically evaluate expressions to a decimal approximation, instead of printing the value with square roots, and 'pi'? Thanks!

Hi! Could someone please tell me how to : Use hyperlinks to refer to other sections with the same worksheet? Thanks :)

Hi dear members of this Forum,

I want to generate a list which depend on "n";

for n=2 I would like to generate the following list

>[[p1>q1, p2>q2],

>[p1>q1, p2<q2],

>[p1<q1, p2>q2],

>[p1<q1, p2<q2]]

for n = 3 I would like to generate the list:

>[ [p1+p2>q1, p1+p3>q2, p2+p3>q3],

[p1+p2>q1, p1+p3>q2, p2+p3<q3],

[p1+p2>q1, p1+p3<q2, p2+p3>q3],

[p1+p2>q1, p1+p3<q2, p2+p3<q3],

[p1+p2<q1, p1+p3>q2, p2+p3>q3],

[p1+p2<q1, p1+p3>q2, p2+p3<q3],

[p1+p2<q1, p1+p3<q2, p2+p3>q3],

[p1+p2<q1, p1+p3<q2, p2+p3<q3]]

for n=4

[ [p1+p2+p3>q1, p1+p2+p4>q2, p1+p3+p4>q3, p2+p3+p4>q4],..

If I have the X and Y variable all done up and I am trying to find a way to figure out if their is a way to make up a quadratic equation with maple. and can maple find the inflextion point of this curve ? Any help would be appreciated. Thanks Jp

is it possible to implement a package so that the documentation and the help files will be automatically extracted from the sources?

Hi everybody ! I'm trying to sort a matricial expression : J=u'*Q*v (the ' is for the transposition, and * the matrix product) where u=A*x+a and v=B*x+b (Q,A and B are (3,3) matrices ; u,v,x,a and b are (3,1) vectors ; so J is a scalar) I want to stay in the formal field ,i.e I give no numerical values to my matrices an vectors. What i would like to do is to write J like : J=x'*K*x + Lx + M where (that's the result I found by hands) : K=A'*Q*B L=b'*Q'*A+a'*Q*B M=a'*Q*b And of course I would prefer Maple doing it for me ! :) As I really don't know how to take the problem, I tried very easy things :

Hi dear Maple's experts, 1.- If I have a variable r0 := x^3, Then, I can save r0 in a file: save r0, "myFile.txt"; Now, if I have some additional variables r1:= y^2+ 10; Is it possible to add r1 to the previous already created "MyFile.txt" (without overwriting the initial file)? 2.- When I work in Maple 10 (worksheet mode).. I woult like not to have to press "F5" to switch from "C 2D Input" to "C Maple Input" . Is it possible to set up "C Maple Input" as default option to write the comands? 3. When I write usually the commands appear in red.. and output appears in blue..It is possible change this colours?.

As a newbie to maple, I was wondering how do I find the maximum of a equation under contraint. i can find some but for this one I can't ... and it's getting to me f=1000*x+7500*y under constraint: g=10000000-(20000*x^0.8)*y^1.2 and for f=(20000*x^0.8)*y^1.2 under constraint: g=125000-1000*x-7500*y Who do I find the maximum using MAple 10 !!!???? Tx for the help

Hi All, I have the following graph: plot([(x/(2*sqrt(x)-3)),(-x+5)],x=-10..10,y=-4..6,discont=true, color=[red,navy], thickness=2); how do I a) label the two functions so that they are visible in the graph i.e. L=-x+5 beside the blue line and f(x)=x/(2*sqrt(x)-3)) in pretty text beside the upper red function? b) I wish for a dashed blue line (-x+5) instead of constant. Thanks in advance for any help :-) Robert

Does anybody know how to install the 10.02 update on a 64-bit version of Maple? -- Regards, Franky.