Hello everyone,

I need to create a 3d plot, but color the surface depending on the function's sign, say red for positive values, green for negative. How can I do that?

Thank you,

Ozgur

Hello

I would like to have an optional input value in my procedure. It could be of type string or numeric value.

Example:

bgp:=proc( x, y, z, optional) local bgp, A;

bgp:=Array(1..2);

bgp₁ :=pointplot3d([x, y, z]);

# if the optional value exists:

bgp₂ :=textplot3d([x, y, z, optional]);

A:=bgp₁;

# and if the optional value exists:

Hello to all,

I have some data and i want to create a 3d columngraph from them but i can't  find a relative command in Maple.. I want something like the "AreaChart" command without the lines connecting the points..One solution is the Pointplot 3d, but if there is a way to do it with columns is much more preferable..!

Thanx!

Hi,

How to output the solution given by pdsolve as a *.csv or a tab delimited text file?

Maple has got to really work on its help documentation.

Thank you,

Regards

with plots

Eq[1] := 5*(diff(f(eta), `$`(eta, 3)))+(m+3)*f(eta)*(diff(f(eta), `$`(eta, 2)))-(2*m+1)*(diff(f(eta), eta))^2-(2*(2*m+1))*h(eta)-(m-2)*eta*(diff(h(eta), eta))

Eq[2] := g(eta)-(diff(h(eta), eta))

Eq[3] := 5*(diff(g(eta), `$`(eta, 2)))/Pr+(m+3)*f(eta)*(diff(g(eta), eta))-5*m*g(eta)*(diff(f(eta), eta))

BCs := [f(0), (D(f))(0), (D(f))(18), g(0)-1, g(18), h(18)]

pars := {Pr = .1, m = 0}

for i to 3 do eq[i] := subs(pars, Eq[i]) end do

I myself have written some programs of math in Maple (e.g. ABC.lib, ABC.ind, ABC.mw).
Who could help me how to upload these programs for everyone using easily without downloading and setup them? Thank you so much!

Dear all,

I wrote some simple functions in Maple 13, called "myproc" file,

and used startup code (edit-->startup code) to initialize it in a worksheet by: read "myproc";

Now I am using Maple 14, it does not work, says, "unable to read", sort of thing.

I have also tried to rename the file to myproc.m and read "myproc.m";

does not work either.

Is there any compatibility problem?

Thanks.

casper

there are several method to provide solve recurrence problems  in Maple,such as define ,rsolve,etc.here ,i meet a problem.

i want to compute the function Gamma(n), if n is a posint ,only given recurrence relation f(z)=(z-1)f(z-1),initial condition,f(0)=1,then i can get the true result with rsolve,of couse,i had made  an ansatz that z is n::posint.yet ,z is not posint? To suppose z  equal to 5/2, (2*n+1)/2 more generally,how can get the answer((2n-1)!!*Pi/2^n).

How to graph a function f(x)=x^2-8x+20. Then use Maple to find all the real and complex zeros?

I have a small Maple program which is manipulating lists which have a habit of becoming too long for maple to handle, which yields the error " 

TaiChi.mw

Hello,

The appendant is a figure I generated in a leisure time a fews days ago. There exist 3 problems, I feel they are a  challenge to me. The third problem is:How to rotate the figure automatically? Like this. Can you give me some advices? Thank you very much! Best Regards!

    I would like to pay attention  to the annular conference Polynomial Computer Algebra '2011, St. Petersburg, Russia, April 17-22, 2011. It happened to me to participate in  a few conferences organized by EIMI. In view of it I can say that    Russian mathematicians and  programmers are strong,  the organizers' hospitality  is warm, and    Saint Petersburg is a great city which is considered to be one of the most beautiful cities of the world.

I am trying to calculate inverse laplace of a 3*3 matrix (answer1 matrix). Find below the maple commands i used.

>with (linear algebra):

A:=<alpha,p11,e11|0,o11,-e11|a,m11,0>

N:=<s,0,0|0,s,0|0,0,s>

k:=N-A

Z:=MatrixInverse(k)

B:=<0,-m11,0>

C:=<1,0,0>

X0:=<isalpha0,ilalpha0,vcalpha0>

answer1:=Z.(X0+(ScalarMultiply(B,uinvalpha/s))+(ScalarMultiply(C,ealpha/s)))