HI. I hope anybody can help me. I have in parametric form a volumetric element in space: >restart: >A:=(r,theta,phi) -> [r*sin(theta)*cos(phi),r*sin(theta)*sin(phi),r*cos(theta)] where: r in [1,3], theta in [Pi/4,Pi/3], phi in [0,3*Pi/4] I know want to plots this as an volume element in maple if possible. This means, that every surface has a grid. Can anyone help me with this one? I only seems to be able to plot planes i maple? //Sentinox
I hope someone has a trick for me:
I have the following polynomia:
My question know is how to create the following list (for use with subs, eval or similar:
I can offcourse just enter the list, but this is not possible when I have very large polynomias.
I tried the "coeff" and the "coeffs", but was not able to get what i wanted.
Hope anyone can help.
When using this syntax in Maple 10:
I get the following output:
3 2 3
f := (x, y) -> x y - 2 x y + x y
2 3 3 2 2
GRAD := [3 x y - 4 x y + y , x - 2 x + 3 x y ]
STATS := [[x = 2, y = 0], [x = 0, y = 0], [x = 0, y = 0],
[x = 5/4, y = 1/4 RootOf(_Z - 5, label = _L2)]]
Anyone knows a command on how to calculate the norm (length) of a vector?
>restart:with(linalg):#I know this package is obsolete, but my Teach only teaches theese commands..
>u:=vector([1,1,1,1]);#a vector i defined
>LengthU:=sqrt(u^2+u^2+u^2+u^2);#This is how I calculate the length theese days...
Anybody knows a command, so that my third line will not be neccesary?