Hello,

I use Maple 18. How can I produce a table of 50 values of the fanction f(x) in the interval [a,b]? size step is (b-a)/n

The title pretty much says it, but I wrote a bunch of code that operates on a matrix of given size. Now I want to increment that size with a loop, how can I put a loop around all the code? It won't let me just copy paste it into my loop body for some reason. Thanks!

I am using solve() to give me a two variable solutions (e.g. a = 3, b = 5). Very often, I have 2 solutions, so the output will be something like {a = .8025072621, b = -.8025072621}, {a = 1.326426441, b = 1.326426441}. I store this output in a matrix called Answers, so that looks like:

Answers:= solve(equation that needs solving). 

Later when I want to access these answers, I'll do Answers[1][1] to get the first a, and Answers[1][2] to get the first b. Overwhelmingly this all works fine, but occassionaly Answers only has one set of solutions, so Answers[1][1] becomes meaningless, for example, if solve() returned {a = 3, b = 4}, then Answers[1] just returns a, and Answers[2] returns b, but Answers[1][1] gives an error. As I cannot predict when solve() will give me one solutions as opposed to 2, how can I write code to reliably access the first solution for use later?

hi, is there any maple command that will allow me to test the speed of a procedure? something like the ctime in c++ or time in java.thanks

example of non linear fractional integraL Equation 

x(t)=(t^3)+1/5 * x(t) * I^(1/2)x^2

how input the integral fraction int(^1/2) for the any function in maple ? 

Hello Please,

I was wondering if the moments(mean, variance,...) of this function bellow exists even if in approximate form.

f(x) = binomial(x+r-1, x)*((1/2)*b/(1+d*x+(1/2)*b))^r*((d*x+1)/(1+d*x+(1/2)*b))^x/(d*x+1)

Somebody, please help.

and why are there decimal points after certain numbers?

I'm taking 2nd semester calculus and in this maple lab, I can't seem to get Maple to evaluate this correctly. Any help is appreciated.

My friend did this and got the first constant, 392..., and just a², so it was 392.07a²

Hallo,

I am rather a beginner in Maple, so I will be grateful for understanding.

I try to solve the equation with one unknown. To create this equation I firstly had to solve the set of four equations so it is very complicated. Maple is able to create the plot of it but command fsolve is not sufficient to solve it. Here is my procedure:

restart:
z1:=H/mg*cosh(mg/H*(x+C11))-C21:
z2:=H/mg*cosh(mg/H*(x+C12))-C22:
tg_alpha1:=diff(z1,x):
tg_alpha2:=diff(z2,x):
r1:=H*subs(x=xP,tg_alpha2)-H*subs(x=xP,tg_alpha1)-P:
r2:=subs(x=0,z1):
r3:=subs(x=l,z2)-h:
r4:=subs(x=xP,z1)-subs(x=xP,z2):
mg:=2:l:=20:h:=5:xP:=l/5:P:=10:
C := solve({r1, r2, r3, r4}, {C11, C12, C21, C22}):
s1 := int(sqrt(1+(diff(subs(C, z1), x))^2), x):
s2 := int(sqrt(1+(diff(subs(C, z2), x))^2), x):
s := subs(x = xP, s1)-subs(x = 0, s1)+s2-subs(x = xP, s2):
eq1 := l0-subs(x = l, s):
l0 := 40:
plot(eq1, H=10 .. 11, colour = red);
H := fsolve(eq1 = 0, H = 10.7 .. 10.8);

I would be grateful for any help and indicating my mistakes.

Thanks

Iza

It seems if I copy some text into one of the cells of a maple spreadsheet I get an error.

Specifically the error only occurs if a space exists in the text.  Also entering text with spaces produces the error as well.

hello there - typed into a cell produces   Error, missing operator or ';'

Similarily    5 4 we receive Error unexpected number

There is only two options for the cell properties under type - Symbolic and Floating Point.  Another option to fix this issue would be to have a Label option?  

Hello all!

I did

with(plottools):

display(pieslice([0,0],5,Pi/4..7Pi/4,color=yellow))

but I don't know how to do "Animating Pacman". Can you help me? I read it on Mapleprimes but I don't really understand. Can you explain it to me? Thank you so much! Sorry, My English is not very good

Wonder if this can be accomplished in Maple.

so I have a list of 100 items labeled {1..100} of various value {$100, $160, $220, ......  , }

the task is to distribute these items among 3 people A,B,C so they get an approximately equal share.

Adding the values and dividing by 3 gives the dollar total to aim for. 

This post has C.Love procedure for evenly sized groups

 http://www.mapleprimes.com/questions/200480-Product-Grouping

but what i want is a method for different sized groups. ie 25 items for A, 35 for B and 40 for C (user defined).

additionally there is a fixed constraint: A has been bequeathed items 1,4,8; B items 2 and 20; C item 50.

restart:
S:= {3, 4, 5, 6, 8, 9, 28, 30, 35}:
SL:= [A,B,C,D,E,F,G,H,I]:
assign(Labels ~ (S) =~ SL); #Create remember table.
AllP:= [seq(P, P= Iterator:-SetPartitions(S, [[3,3]], compile= false))]:
lnp:= evalf(ln((`*`(S[]))^(1/3))):

Var:= proc(P::({list,set}(set)))
local r:= evalf(`+`(map(b-> abs(ln(`*`(b[]))-lnp), P)[]));
end proc:

Min:= proc(S::{list,set}, P::procedure)
local M:= infinity, X:= (), x, v;
     for x in S do
          v:= P(x);
          if v < M then  M:= v;  X:= x  end if
     end do;
     X
end proc:

ans:= Min(AllP, Var);
              [{3, 9, 35}, {4, 8, 28}, {5, 6, 30}]
subsindets(ans, posint, Labels);
               [{I, A, F}, {B, E, G}, {C, D, H}]

Hi

When I run a maple file it uses 25% of CPU.

When I run 2 files, the half of CPU is used.

How can I change the preferences for using most of CPU

Hello,

i need help to translate a system which is given below to a for loop.

Other wise i am writing it with myself. 

instead of doing it like that 

with(LinearAlgebra);

sys := [galerkin_funcs[1], galerkin_funcs[2], galerkin_funcs[3], galerkin_funcs[4], galerkin_funcs[5], galerkin_funcs[6], galerkin_funcs[7], galerkin_funcs[8], galerkin_funcs[9], galerkin_funcs[10]];

var := [w[1], w[2], w[3], w[4], w[5], w[6]];

Kmat, Fmat := GenerateMatrix(sys, var);

i want to do it like that.

N:=10

for i to N+4 do

sys(1,i) := galerkin_funcs[i] 

end do

for i to N do

var(1,i) := w[i] 

end do

After that i will generate matrix with this comman Kmat, Fmat := GenerateMatrix(sys, var);

But this for loop i wrote is not doing the i want to do.

Thanks for your help.

Error, (in fsolve/polynom) Digits cannot exceed 38654705646

I am using fsolve to find numerical approximations to the roots of many fairly large polynomials (degrees up to ~80).  I often get this error message and I'm not sure why.  Is there any workaround?  Any help is much appreciated.

Is there a bug for resizing the spreadsheet?  I am unable to drag the size to the full worksheet.  If it's a bug is there a workaround?