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How do I make a point on a chart move as I drag a ...

Asked by: Soldalma 45
August 13 2016
1  2

I wote a command that creates a plot with a single point:

plots[pointplot](a*[1, 1])

Before hitting Enter I called the context menu and chose Explore. As I change the parameter a the point remains fixed in the picture but the scales change. I wanted the opposite: the scales should stay fixed and the point should move. How can I do this using Explore or in some other way? I would like to see the point move as I drag a slider control.

Thanks for the help.

 

problem with integration,which one is correct !?...

Asked by: mehdi jafari 774
integral
August 13 2016
0  4

hi every one , i have a problem with integration,which one is correct !? also when i remove epsilon option, it returns unevaluated integral . can i have crorrect and reliable answer?

> 

restart
> 

with(LinearAlgebra):
> 

Digits := 30;

30

 (1)

``

> 

N := 4;

4

  

proc (x, s) options operator, arrow; exp(x*s) end proc

  

proc (x) options operator, arrow; exp(2*x)+(exp(x*(x+2))-exp(-x-2))/(x+2) end proc

 (2)
> 

alpha := -1/2;

-1/2

  

-1/2

 (3)
> 

for n from 0 to N+1 do J[n] := unapply(simplify((-1)^n*(1-x)^(-alpha)*(1+x)^(-beta)*(diff((1-x)^(n+alpha)*(1+x)^(n+beta), [`$`(x, n)]))/(2^n*factorial(n))), x) end do;

proc (x) options operator, arrow; 1 end proc

  

proc (x) options operator, arrow; (1/2)*x end proc

  

proc (x) options operator, arrow; (3/4)*x^2-3/8 end proc

  

proc (x) options operator, arrow; (5/4)*x^3-(15/16)*x end proc

  

proc (x) options operator, arrow; (35/16)*x^4-(35/16)*x^2+35/128 end proc

  

proc (x) options operator, arrow; (315/256)*x+(63/16)*x^5-(315/64)*x^3 end proc

 (4)
> 

u := unapply(exp(2*x), x);

proc (x) options operator, arrow; exp(2*x) end proc

 (5)
> 

for i from 0 to N do phi[i] := J[i](x) end do

1

  

(1/2)*x

  

(3/4)*x^2-3/8

  

(5/4)*x^3-(15/16)*x

  

(35/16)*x^4-(35/16)*x^2+35/128

 (6)
> 

w1 := (1-x)^alpha*(1+x)^beta;

1/((1-x)^(1/2)*(1+x)^(1/2))

 (7)
> 

for j from 0 to N do S[j] := simplify(evalf(int(k(x, s)*subs(x = s, phi[j]), s = -1 .. x))) end do;

(-1.*exp(-1.*x)+1.*exp(x^2))/x

  

.5*(exp(x^2)*x^2+exp(-1.*x)*x+exp(-1.*x)-exp(x^2))/x^2

  

((.75*x^4-1.875*x^2+1.5)*exp(x^2)-.375*(x+2.)^2*exp(-1.*x))/x^3

  

((1.25*x^6-4.6875*x^4+8.4375*x^2-7.5)*exp(x^2)+(.3125*x^3+2.8125*x^2+7.5*x+7.5)*exp(-1.*x))/x^4

  

((2.1875*x^8-10.9375*x^6+30.8984375*x^4-56.875*x^2+52.5)*exp(x^2)+(-.2734375*x^4-4.375*x^3-21.875*x^2-52.5*x-52.5)*exp(-1.*x))/x^5

 (8)
> 

for i from 0 to N do evalf(Int(phi[i]*S[3]*w1, x = -1 .. 1, epsilon = 0.1e-24)) end do

-0.940736801761282474970573535984e-2

  

-0.499428361530268194608821964968e-1

  

-0.716662760275484038621082776589e-1

  

-0.175968374179810236471161325565e-3

  

0.205695155661022012897834537769e-1

 (9)
> 

for i from 0 to N do evalf(Student:-Calculus1:-ApproximateInt(phi[i]*S[3]*w1, x = -1 .. 1)) end do

0.112342629325121433520368350257e-1

  

-0.372785154811933200270010346236e-1

  

-0.625152339329758587804224387138e-1

  

0.880883783666879589242935631796e-2

  

0.300672960958837351790545896762e-1

 (10)
> 

 

NULL

 

Download kk.mw

Math Input Panel...

Asked by: Samuel Hollis 100
input
August 13 2016
0  0

I use Maple on a Surface Pro 4 tablet and the math input panel does not work with Maple.  This would be a great feature to have.  Or does anybody know how to get it working?

Substituting value with template problem...

Asked by: Samuel Hollis 100
August 13 2016
0  3

Why can't I sub both values at the same time and/or why does k stay symbolic but not d?

BVP Ode ,how can tackle derivative involve in bcs...

Asked by: mehar_irfan 10
ode dsolve
August 12 2016
0  2

how i tackle an bvp ode,derivative involve in bcs.i want to solve by dsolve comand or by using Rk meethod.i am attaching the maple sheet,ode wrrten in attached maple sheet

thank you  

> 

restart
> 

NULL
> 

NULL
> 

NULL
> 

``
> 

``

 few boundary conditions: expected 7, got 2

  
> 

``
> 

NULL


Download kummer_sol.mwkummer_sol.mw

> 

restart
> 

NULL
> 

NULL
> 

NULL
> 

``
> 

``

Error, (in dsolve/numeric/bvp/convertsys) too few boundary conditions: expected 7, got 2

  
> 

``
> 

NULL


Download kummer_sol.mw

Parametric form...

Asked by: Entvex 20
August 12 2016
2  12

Hello awesome maple people

I have the following Matrix

R := Matrix([[1, -2, 2, 6, -6], [2, -3, 4, 9, -8]])

then i do

ReducedRowEchelonForm(R);

and i get an output, but is there any way to get it to give me the output in Parametric form?

Like this https://snag.gy/BQniuR.jpg

Thanks in advance :)

 

 

Problem with PDE...

Asked by: mehdi jafari 774
pde condition
August 12 2016
0  3

i have 2 PDE equations with some boundary conditions,maple get me errors, what should i do ? please help
how can i make correction in my system or boundary to have a solution ?

Download pde2.mw

tnx in advance

Error, (in dsolve/numeric/bvp) system is singular ...

Asked by: faisal 15
ode dsolve numeric
August 12 2016
0  1


Hello Dr/Prof?sir?madam

i have problem on running the ode bcs

there is cos n sine in ther ode

any idea to solve this ?

i have attched it

thnks
Maple Worksheet - Error

Failed to load the worksheet /maplenet/convert/Sc.mw .

Download Sc.mw

Issues with differential and D operator...

Asked by: sunit 105
substitution
August 12 2016
1  11

Hi,

I am trying to do a numerical approximate method 'method of multiple scales'. And in doing so I am getting following equation.

> 

restart
> 

junk := -n*v_SDD*x[1](T[0], T[1], T[2])+x[1](T[0], T[1], T[2])+(D[1, 1](x[1]))(T[0], T[1], T[2])+2*kappa*(D[1](x[1]))(T[0], T[1], T[2])+n*v_SDD*x[1](T[0]-tau_1, T[1], T[2])-psi*n*x[1](T[0]-tau_1, T[1], T[2])+psi*n*x[1](T[0], T[1], T[2])

-n*v_SDD*x[1](T[0], T[1], T[2])+x[1](T[0], T[1], T[2])+(D[1, 1](x[1]))(T[0], T[1], T[2])+2*kappa*(D[1](x[1]))(T[0], T[1], T[2])+n*v_SDD*x[1](T[0]-tau_1, T[1], T[2])-psi*n*x[1](T[0]-tau_1, T[1], T[2])+psi*n*x[1](T[0], T[1], T[2])

 (1)
> 

evalf(subs(x[1](T[0], T[1], T[2]) = R(T[1], T[2])*sin(omega*T[0]+phi(T[1], T[2])), %))

-1.*n*v_SDD*R(T[1], T[2])*sin(omega*T[0]+phi(T[1], T[2]))+R(T[1], T[2])*sin(omega*T[0]+phi(T[1], T[2]))+(D[1, 1](x[1]))(T[0], T[1], T[2])+2.*kappa*(D[1](x[1]))(T[0], T[1], T[2])+n*v_SDD*x[1](T[0]-tau_1, T[1], T[2])-1.*psi*n*x[1](T[0]-tau_1, T[1], T[2])+psi*n*R(T[1], T[2])*sin(omega*T[0]+phi(T[1], T[2]))

 (2)
> 

``


Download question3.mw

Now I need to substitute x_1(T0,T1,T2)=R(T1,T2)sin(omega*T0+phi(T1,T2)) in the expression and evaluate it.  But on substituting, it is not solving for the 'D' operator. In a similar line if I will have a differential term like

D1(x1)(T0-tau_1,T1,T2) and I have to substitute x1(T0-tau_1,T1,T2) then how can i do it?

Please help me regarding it.

Thanks and regards

Sunit

Why can't I delete the result of Explore from my D...

Asked by: Soldalma 45
August 11 2016
1  1

I created a new Document with a single command:

A=1

Then I right-clicked on the command and chose Explore from the context menu and then clicked on the Explore button in the dialog box. A rectangle with a slider appeared. So far so good.  However, I cannot delete the rectangle from my Document. I tried to select the rectangle and press Delete, Ctrl+Delete, and to right-click on it and choose Cut from the menu. Nothing works.

If I select both the rectangle and the command A=1 all the three actions described above also fail to delete anything.

Help will be appreciated.

How to find selected coefficient in Differential e...

Asked by: mskalsi 290
coefficients
August 11 2016
3  12

How I can find coefficient of g(z)^-2, g(z)^4 in differential expression ?


> 

with(PDEtools):
> 

(diff(g(z), x))*g(z)^3+(diff(g(z), z, z))*g(z)^4+(diff(g(z), z, z, z))*g(z)^5+(diff(g(z), z))/g(z)^2

(diff(diff(g(z), z), z))*g(z)^4+(diff(diff(diff(g(z), z), z), z))*g(z)^5+(diff(g(z), z))/g(z)^2

 (1)
> 

dcoeffs((diff(diff(g(z), z), z))*g(z)^4+(diff(diff(diff(g(z), z), z), z))*g(z)^5+(diff(g(z), z))/g(z)^2, g(z))

1, 1, 1/g(z)^2

 (2)
> 

dcoeffs((diff(diff(g(z), z), z))*g(z)^4+(diff(diff(diff(g(z), z), z), z))*g(z)^5+(diff(g(z), z))/g(z)^2, g(z)^4)

Error, invalid input: PDEtools:-dcoeffs expects its 2nd argument, V, to be of type {`PDEtools/F(x,...)`, And(function, `ODEtools/F(x)`)}, but received g(z)^4

  
> 

coeff((diff(diff(g(z), z), z))*g(z)^4+(diff(diff(diff(g(z), z), z), z))*g(z)^5+(diff(g(z), z))/g(z)^2, g(z)^2)

Error, unable to compute coeff

  
> 

coeff((diff(diff(g(z), z), z))*g(z)^4+(diff(diff(diff(g(z), z), z), z))*g(z)^5+(diff(g(z), z))/g(z)^2, 1/g(z))

Error, unable to compute coeff

  
> 

``


Download Finding_Coefficients.mw

Regards

Why can't I assign to a name the expression A=(1,2...

Asked by: Soldalma 45
August 11 2016
1  5

Using Maple 2016, I created a new Document with one line:

A=(1,2,3)

Right-clicking on this expression I thought I could choose Assign to a Name, as is done in Clickable Calculus Series - Part 3: Multivariate Calculus, found here:

https://www.youtube.com/watch?v=GYN-GetHRFA

However, Assign to a Name does not appear in the context menu.

On the other hand, if I write

B=1,2,3

(with no parentheses) and right-click on this expression then Assign to a Name does appear in the context menu.

Any insights on this?

Thanks. 

How to show numerical results (float) using engine...

Asked by: MortenZdk 65
August 11 2016
0  11

When doing numerical calculations or evaluations it is very useful to have float results shown in numeric notation, where the exponent is 3 * n.

Below are some simple calculations:

Is there a way to make Maple show the resultin (1) .. (3) as:

  • 333.3 106
  • 333.3 103
  • 333.3 100 or just 333.3

 

Error, (in Engine:-Dispatch) not implemented yet: ...

Asked by: Adam Ledger 360
limit psi
August 11 2016
0  4

sorry what is what dispatch and implementing what? i get these every week for a number of cases sometimes it specifies that it is an "unhandled psi case" still waiting on that built in proc u guys where gonna dispatch like u know the reasons ppl always have a whinge about evalf not working in some cases  anyway a few people have run into these error id say.

how to debug inbuilt functions...

Asked by: Adam Ledger 360
August 10 2016
0  18

yes its just one inbuilt function i really need to study in particular, if someone can help me to do this pls.

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