Hello, 

I'd like to identify terms before the differential terms (theta(t), diff(theta(t),t) ...)

The following code with coeff function works for  diff(theta(t), t, t)) but not for diff(theta(t), t)

Here the code :

eq1pp := R(t) = -(-sin(theta[0]+phi)*Isup-sin(theta[0]+phi)*L[fixe]^2*M[fixe]-sin(theta[0]+phi)*L[r]^2*M[r]-sin(theta[0]+phi)*L[sup]^2*M[sup]+cos(theta[0]+phi)*a*sin(phi)*L[fixe]*M[fixe]+cos(theta[0...

I have just made my first polar plot, but I am a little disappointed with the result.

Code
polarplot([(1+cos(x)^2)*(1/2), cos(x)], x = 0 .. (1/2)*Pi) 

Output

How can I remove that little gap between the grey line and the black line?

Hi,

with great interest and surprise I read the post
"Converting Half-Angle Trig Formulas to Radicals".
Isnt it possible to evaluate cos(arccos(13/14)/3) also
to an exact expression in radicals ?
I simply do not succeed with my humble knowledge of
the Maple commands/internal workings...
Would be great if someone finds a solution ( of an 
unsolvable problem ??? ).

[Edit: Excess white space deleted.---Carl Love]

Good afternoon, to successfully complete my study on beam vibration i wrote a matlab code to produce all my calculations. This is the beginning of the ocde and shows the point were i get stuck:

prod2=5/2*  3200/4507*sin(pi*alp)*sin(pi*bet)/s*sin(pi*x)*pi^4*sin(pi*y)+19200/4507*sin(pi*alp)*sin(pi*bet)/s^5*sin(pi*x)*sin(pi*y)-6400/4507*sin(pi*alp)*sin(pi*bet)/s^3*sin(pi*x)*pi^2*sin(pi*y))*pi*exp(-5*(x^2-2*x*alp+alp^2-y^2+2*y*bet-bet^2)^(1/2))

heya,

i got a problem. I got a list "L" of 3d points [[x1,y1,z1],[x2,y2,z2],..[xi,yi,zi]](in maple), i can easily plot the with pointplot3d(L, axis=normal) but i would need to have them plotted in a contourplot (not the 3D one but the 2d) with contourlines at every full number (1,2,3..highest z value) (well i wont get higher z values then 20)

could you plz tell me how to do that ?

thanks michael

I am working on a program to calculate steady-state probability in a given Markov chain. My code is pasted as bellow:

CalculateSteadyStateProbability := proc (m::integer, r::integer, CV, ROU) 

local P, solutions, pai, l, eqns; 

P := CalculateMatrix(m, r, CV, ROU);    #here we calculate a (m+r)x(m+r) transition martix

eqns := {`$`('pai[i+1] = add(pai[j+1]*P[j+1, i+1], j = 0 .. m+r)', i = 0 .. m+r)

 ...

http://www.mapleprimes.com/questions/144384-Polynomials-Not-In-The-Correct-Indeterminates

above link's comment said eliminate will NOT generate a polynomial in all cases

make me think that eliminate in above link can not return correct one.

what is the correct way to convert groebner basis of kernel into kernel?

I've created som Maple-code to determine if for all entrances in a quadratic matrix, D, the inequality d_i,j <= d_{i,k +} d_k,j is true.

Hi,

I have a 12 vectors represented by magnitude and phase, written in two separate columns in an excel file. First column is the magnitude and the second one the phase. And I want to plot this vectors in a polarpolt..Any ideas?

Thanks 

Hey,

I have currently encountered a problem that I am not sure if is a mathematical problem or a problem with Maple itself. I want to find the eigenvalues and eigenvectors of the following matrix:

[[2.460*10^9*sin(theta)^2+8.970*10^6*cos(theta)^2, 0, 2.449*10^9*sin(theta)*cos(theta)], [0,8.450*10^6*sin(theta)^2+8.970*10^6*cos(theta)^2,0],[2.449*10^9*sin(theta)*cos(theta),8.970*10^6*sin(theta)^2+2.530*10^9*cos(theta)^2]]

Maple is able to conjure...

Hi,

I am trying to create a vector like

Nr:=5:

p:=2*Vector[column]([$0..Nr])+ConstantVector[column](1,Nr+1);

this one works fine but when I want descending order, i.e,

p:=2*Vector[column]([$Nr..0])+ConstantVector[column](1,Nr+1);

it is not working. I would appreciate the suggestions.

Hi there,

I have

x[i]=sum(sin(theta[j](t)), j = 1 .. i-1)

assuming i is integer and  i>=1 can Maple help me to differentiate with respect to time t ( for example diff(x[i],t) ) so

Has anyone used this product

Maple IDE is the only Eclipse™ based efficient development toolkit to rapidly build standout applications for one of the most powerful Computer Algebra Systems.

http://www.digi-area.com/CasStudio/Maple/

Use RSA with the modulus n=119 and the exponent e=7, with the 95-character alphabet consisting of the printable ASCII characters to encrypt the word "Yes". Recall that the alphabet is given by

Alphabet:=cat(Select(IsPrintable,convert([seq(i,i=1..255)],bytes)));

so that Y=57, e=69, s=83. Give your encryption as a list of three numbers.

Hi,

I have an excel file with 10 columns by 10008 rows, the first one represent the time and the others represents some measuremts. And I would like to plot the columns which represent the measurements versus the first column which represent the time in Maple.

Do you have any idea how I can do this?

Thank you