I have a matrix,  T:=[cos(x)  -sin(x); sin(x)  cos(x)].

Maple11 can calculate the eigenvalues symbolically. Nice property. However

(v,e):=Eigenvectors(T)

gives

Error, (in LinearAlgebra:-LA_Main:-Eigenvectors) expecting either Matrices of rationals, rational functions, radical functions, algebraic numbers, or algebraic functions, or Matrices of complex(numeric) values.

Is there any possibility to calculate the eigenvectors symbolically?

Thanks,

Hi everyone,

i want to find the solution(s) to the following equation numerically:

f:=1+x^2+1/100*abs(ln(3-4*x))=0;

But fsolve refuses to work, it just gives the input back. Setting Digits to a stellar value didn't help, i also tried different initial points. 

 

Thomas

 

 

 

 

As the subject says, how do i solve an augmented matrix step by step so i can follow each change in the matrix. The augmented matrix is two 3x3 matrixes put together with the operator (<A|B>]. I hope yoy understand my "Swedish English".

Kefil

<p>Hey,</p>
<p>I've got this function:</p>
<p>f(x) = (x + y)(x^2 + y^2)</p>
<p> </p>
<p>By applying the product rule by hand I get the following partial derivative (with respect to x):</p>
<p>df/dx = (x^2 + y^2) + (x + y)2x</p>
<p> </p>
<p>I would expect Maple to give me the same result but instead I get the following:</p>
<p>f := (x + y)(x^2 + y^2)</p>
<p>diff(f,x) = 2*(D(x))(x^2 + y^2)*x + 2*(D(y))(x^2 + y^2)*x</p>
<p> </p>
<p>This has me a bit stumped so I'm hoping someone is able to help me out.</p>
<p>Thanks in advance.</p>

I have a problem and hope, anybody can help me with that.

I have density data dependig on temperature and pressure. The data are stored in an excel file (in a square block - see attachment). Is there an easy way to import this data in Maple, that I can use several values of the density at given a pressure and temperature? Maybe comparable with a table (or matrix) where you can pick out indexed values, e.g. rho[temperature,pressure].

My current solution is to write a procedure, but before that I would like to know if there is an easyer way.

How can I change the fonts used to create the legend for a plot?

What I really want to do is increase the font size. I can do this for the title, labels, and axes - but not for the legend. (At least I don't see how to do this in the online help.)

Before I start digging through the code, I thought I'd see if anyone here has dealt with this previously.

Doug

I'm trying to plot 1/2*L*(14.4/(1.5+R)^2<=423e-6.  My L ranges are L=757.4e-6..1135.1e-6 and the R ranges are R=13.85..15.95.  I'm trying to filter some pumps based on their inductance and resistance, and they need to fall under 423 uJ.  I looked at some implicit plot commands but didn't see exactly what I needed.

 

Thanks!

Here is a recent session on Maple 12.1. The exact thing happens on Maple 11.5. I define a vector x , Maple acknowledges the fact but then if I ask if x is, in fact, that vector it says no. Any idea of what is going on? with(LinearAlgebra): > x := Vector(2, [1, 0]); Note Maple correctly prints transpose [1 0] on screen. [1] x := [ ] [0] if x=Vector(2, [1, 0]) then 7 else 3 end if; 3 is(x=Vector(2, [1, 0]));

Hi,

I'm trying to solve a system of equations in a matrix. The matrix is of the form <(1/5)*sqrt(6)*c[3, 1]+(1/7)*sqrt(6)*c[3, 3],0,(2/7)*c[3, 3]*c[3, 1]+(2/9)*c[3, 3]^2>, which I want to equate to <0,0,1> to simultaneously find numerical values for c[3,1] and c[3,3]. I then need to take these values and imput them into a bigger matrix and repeat; I think I can do that but I'm caught up on this part. I've tried various commands from linalg, LinearAlgebra and Student[LinearAlgebra], with very little success.

Any help would be very much appreciated.

Hi, i have a rather basic question. Both code pieces do the same:

restart:
 for i from 1 to 5 do  a[i]:=i;  end do;

a[3];

3

restart:
 for i from 1 to 5 do  a(i):=i;  end do;

a(3);

3

 

In which case should  i use round brackets and when square brackets for indexing ?

Does it matter ?

 

Thomas

Hello

I have this problem:

I have two non linear equations with twos solutions (Ea and F in the picture)

I need the alpha that gives me the max Ea

How can I enter this in maple.

Thanks a lot!

I attach an image of the equations to be more specifyc

HI,

Does anybody know about this function, that is no more in Maple as a spécial function?  I search the web and I can't find the series that represent this function.  Is there somewhere a Maple's user who have program it so I can use it in Maple 12?

Mario Lemelin

If I do   5466!   I get a number with a bracket saying 17859 digits.  Okay so now I want to explore that number ....

When I right click and explore.  A little explore window pops up an that's it.  No exploration of the number what-so-ever.  How do I explore that number?

Hi all,

when using solve to solve a simultaneous equation e.g. " solve({6*c+d=24,6*c^2+d^2=96}; " I will obtain two solutions, or with different values maybe even more, I want to put the solutions into an equation e.g." c^6*d" and obtain the maximum value from all the sets of solutions I have.

Any help I will be very grateful, at the moment I am working out by copying and pasting but it will get much harder as the number of solutions increases.

Thanks,

Alex

hi everybody