Good morning sir.

This is just to get awareness that can we able to generate the Greshgorin circles for a given square matrix A

by using direct maple commands in linear algebra package.

I request your kind support in this regard.

I want to fit a function to data which I did with the fit command

f := Fit(1+a*n^b, X, Y, n, output = [leastsquaresfunction])

btw: the output standarderrors does not work...

it produces the error:

Error, (in Statistics:-Fit) values for these items are not available: ["standarderrors"]

Now maple just returns the least square parameters but without errors.

How can I get the errors for the parameters?

So I am working with the OrthgonalExpansions library (amazing library, by the way! Just what I needed!), and it is great, except it seems to be having trouble doing a 2d Fourier expansion.

I'll upload my document. transformApprox.mw

In this document, I am running the BesselSeries expansion as we speak, but the FourierSeries expansion (in 2d) can never seem to complete. It always say that it has an

I am working with a home-brewed program that evaluates magnetic fields from air-core coils. While I have analytic expressions for the field itself, the code involves numeric integration through regions of the field. It also involves adding up the contributions of several coils.

Speed is becoming an issue. I dearly would like to run some of the integrations (which is where the time is spent) in parallel. The contributions from different coils would trivially parallelize,...

The goal is to get Kalman Form

https://docs.google.com/file/d/0Bxs_ao6uuBDUT25BeVhtWjZwRUU/edit?usp=sharing

https://docs.google.com/file/d/0Bxs_ao6uuBDUVXU5dXh6Rl9zUUU/edit?usp=sharing

I am doing the example in page 707 of Partial Differential control theory Volume 2 by J.F.

when using Robertz Daniel's Ore and Involutive packages

with(Involutive):

with(OreModules):

Alg := DefineOreAlgebra(diff=[D,t...

Find a(n)of sequence:5, 7, 7, 2, 1, 5, 6, 6, 4, ...............

Hello everyone,

I have a system of PDEs

restart:with(PDEtools):with(plots,implicitplot):

Pr:=1:A:=1:lambda:=1:Omega:=1:epsilon:=1:C1:=1:N:=5:b:=1:fw:=1:a:=1:

Eq1:=diff(f(eta,tau),eta,eta,eta)-diff(theta(eta,tau),eta)*diff(f(eta,tau),eta,eta)+

f(eta,tau)*diff(f(eta,tau),eta,eta)-(diff(f(eta,tau),eta))^2-(1+A*(1-theta(eta,tau)))*diff(f(eta,tau),eta)

+lambda*(1+epsilon*cos(Pi*tau))*theta(eta,tau)-Omega*diff(diff(f(eta,tau),tau),eta);

Good morning sir,

I request you to provide the correct Maple proc to generate the Gershgorin circles for a given

Square Matrix

Good morning sir,

I request your support for the above cited subject.

Once a plot is generated using Maple commands for a certain problem, to lable the axes

I am facing the problem to lable at the desired positions on the graph.

I have some difficulties in my little example:

K:=(I_tr*sin(a+b)²-I_trsin(a-b)²)/(I_tr*sin(a+b)²+I_trsin(a-b)²)+2*I_ex

... after few transformations ...

K:=sin(2a)sin(2b)/(sin(a)²cos(b)²+cos(a)²sin(b)²+I_ex/I_tr)

also we have:

r:=I_ex/I_tr

d:=1+2*r

Hello everyone, i would like to make a graph to show the where the 2 funtions meet. I have already made the calculation but i also wanna show it in a graph, please help. 

y=2x-3

y=-0,5+7

My question is in the title, here is simple example: 

K:=(sin^2(a+b)-sin^2(a-b))

I use formula of abridged multiplication (with help of "factor")

>factor(K)

  (sin(a+b) - sin(a-b))(sin(a+b) + sin(a-b))

Then expand:

>expand(%, trig)

  4sin(a)cos(b)cos(a)sin(b)

And all I whant now is to use double angle formula like this:

4sin(a)cos(b)cos(a)sin(b) = sin(2a)sin(2b)

Hello,

It's a very easy question but i don't find for the moment.

I want to measure an angle in a revolute joint. For that purpose, i use a probe to measure the angle. The angle is measured in rad. How can i do to change in deg ?

Thank you for your help.

Hi, I need some help with my code. I got the code that you can see below:

> with(DEtools);

> with(plots);

> cc := Array(["Blue", "Red", "DarkGoldenrod", "Black", "LimeGreen", "DarkMagenta", "Indigo"]);

> ll := Array(...