Let ABC be a triangle with A(3,0,0),B(0,6,0),C(0,0,4) and let H(x,y,z) be its orthocenter .Find the coordinates of point H ?

I always find it difficult to debug maple codes. I'm used to the debug feature in programing laguages like C#, VB.Net, JAVA even MATLAB. They all have one thing in common which is the use of breakpoints. Breakpoints are inserted at different parts of a code so as to follow the program execution and to trace out errors. Is any similar feature in Maple? I only know the DEBUB() function and not that helpful to me.

Please, I have an error message which says Error, (in eul) illegal use of a formal parameter. I can't find the cause of the error. I got the result I wanted if i remove these lines eul := proc(x,y) , return yt: , end proc: and

yv := eul(x,y); that is if I consider the for..loop alone.

fxy := proc(x,y)
  return x/y;
end proc:

a := 0:
b := 1:
N := 10:
h := evalf((b-a)/N):
x := 0:
y := -2:
yt := Vector(3):

eul := proc(x,y)
    for j from 1 to 3 do
          y[j]:= y + h*fxy(x,y):
          x:= 0 + j*h:
          y := y[j]:
          yt[j] := y:
    end do:
    return yt:
end proc:
yv := eul(x,y);

Hi all, 

I'm trying to implement the smithChart on Maple, but this error "Error, (in unknown) invalid transform: output is not 2 or 3 element" keeps popping up for some reason. I have no idea how to fix it. Can anyone help me with this? Here is the smithChart:




smithChart.mw

smithChart := proc(r)
  local i, a, b, c;
   a := PLOT(seq(plottools[arc]([-i*r/4, 0], i*r/4, 0..Pi),
                 i = 1..4),

  plottools[arc]([0, r/2], r/2,
            Pi-arcsin(3/5)..3*Pi/2),
  plottools[arc]([0,r], r, Pi..Pi+arcsin(15/17)),
  plottools[arc]([0, 2*r], 2*r,
            Pi+arcsin(3/5)..Pi+arcsin(63/65)),
  plottools[arc]([0,4*r], 4*r,
            Pi+arcsin(15/17)..Pi+arcsin(63/65)));

  b := plottools[transform]((x, y) -> [x-y])(a);
  c := plottools[line]([0,0], [-2*r, 0]):
  plots[display](a, b, c, axes = none, scaling = constrained, args[2..nargs]);
  end proc:

smithChart(1);
Error, (in unknown) invalid transform: output is not 2 or 3 elements

I got a code file and i dont know how to load it in Linux. In Windows i just type:

read "E:/code.txt"

But thing now i change to use Linux and cant do the same (Maple 2015 64bit Linux ver), try to load

read "/root/Desktop/code.txt"

It show me that:

I click Cancel and it show me:

Hope can help me another ways to use and load my code to run.

Is there something I can put at the beginning of my worksheet to tell Maple to do everything in fractions?

Maple is outputing things like -0.166666667 when I solve an equation and I know that is -1/6

Hi,

In a simulation code I use "module-factory" concepts (where a module has a proc; the proc in turn returns another module that has all the procs one wants) a fair bit to keep the code readable and maintainable.

At this point I have the code mostly doing what I want it to, but the run time could be improved (read: I want it to go faster). So I have started working with CodeTools:-Profiling. Quickly I am running into the Profile() function apparently not being able to deal with my generated procedures.

Is there a way out? In other locations I read about procs to be profiled having to be in a Maple library; this is the case for my routines (it all is in a big module with procs, submodules etc.). I'd rather not rewrite the code extensively just to allow profiling (in particular I would not really like to abandon the module-factory scheme), but of course I can do some modification.

Any suggestions?

M.D.

hello

took this problem from a uk tv program.

4 dancers are initially at the 4 corners of a square, edge length 4 meters. every dancer moves towards the person on their left.

i want to know the equations of the spiral. the arc length of each path should be 4m.  also an animation of the 4 spirals would be great. 

dance.mw

under the heading "more spirals" the closest one is r(t)=1/t (decreasing modulus)

http://mathematische-basteleien.de/spiral.htm

Hello,

Anyone here know how to use the read command. I tried to use it to call and run the particular code but it didnt work. It produce this such error 

> read "02ExactSoln.m";
Error, could not open `02ExactSoln.m` for reading

I have no idea how to fix it. Or do I need to locate the code in any specific folder. 

Thanks

Here is the function I want to find the inverse of 

 U(x):=-(s^2/(s^2+1)+1/(s^2+1)-1)*exp(sqrt(s)*x/sqrt(phi))/(s^2+1)+exp(-sqrt(s)*x/sqrt(phi))/(s^2+1);

where phi>0

Now taking the inverselaplace of U(x)

 u:=invlaplace(U(x),s,t);

which give me an unevaluated integral.

Any idea, how to get the complete inverse, maybe interms of erf?

Hi,

  I have the following input

f:=x^2*exp(-1.2*x);
maximize(f, x=0..100,location);

 Maple gives me the location is x=1.25. However, how should I do to obtain this position?  If I write

a:=maximize(f, x=0..100,location);

  Seems it do not work :(

  I may try fsolve at the maximum value, but it seems to be awkward..

Thank you very much!

Is it possible to have an input box, where the student can give an input (integer) and this is then used in the following questions in an assignment?

e.g. in the first question the student is asked to give his student number, in the second question this number is used to create random parameters.

Hi guys.

I want to know how can I make the maple to give final response of a simple trigonometric function, e.g sin(pi/6). When I type sin(pi/6) in the command line and then press enter, maple give the same, I mean sin(pi/6) at the next line. I want 0.5 as the final response not sin(pi/6) again. Simplify command does not work for me in this case.

Thanks in advance.

When solving a simple assignment problem in Maple 2015.1 the bug occurs:

In Maple 2012 there are no problems:

A := Matrix([[1, 7, 1, 3], [1, 6, 4, 6], [17, 1, 5, 1], [1, 6, 10, 4]]):

n:=4:

z:=add(add(A[i,j]*x[i,j], j=1..n), i=1..n):

restr:={seq(add(x[i,j], i=1..n)=1, j=1..n),seq(add(x[i,j], j=1..n)=1, i=1..n)};

sol:=Optimization[LPSolve](z, restr, assume=binary); 

Hello

I am working on a project where I need to find the parameters of the formula:

1/2*a*erfc(1/2*2^(1/2)*(-x+m1)/s1)+(1/2-1/2*a)*erfc(1/2*2^(1/2)*(-x+m2)/s2)

which is the formula for the cumulative distribution for two gaussian peaks, one with average m1 and standard deviation s1, the other m2 and s2, with weights a and (1-a). I have data in excel that form the gaussian distribution but now I need to find the parameters of the formula that fits these data.

Is there a command in maple to find these parameters or how do I start? And do I need to upload the data from excel to maple or do I need to insert only some values?

Some one who could help me, because it is really hard and I find no information for this.

Hasselhof