I have a matlab assignment I am working on. It is kicking my ace. I need to make a phase plot of a 3x3 matrix. I know how to do a 2x2, but adding a Z parameter is getting me. 2x2 file of [-4,-6;-1,6] >>f=inline('(-4*x-6*y)./(-x+6*y)','x','y') f = Inline function: f(x,y) = (-4*x-6*y)./(-x+6*y) >> dirfield(f,[-2,2,-2,2],'line') >> axis equal tight What is the trick for a 3x3? Thanx

http://www.math.uic.edu/~hanson/MATLABhelp.html The MIT link and Naval Academy link help the most. I'm trying to remember, I really am.

I know that function is useless on a 3x3 as it is a manipulation of dy/dx. I don't know how to use the plot3 command for a matrix.

Was this a homework problem? I think it's a trick question. To solve for a 3x3 matrix, there is no way linear funtion could work. You can do it for an array, but not in a matrix. I'm probalby wrong, it's just been so dern long since I even thought about this stuff.

Ya it is a lab/homework. I am not positive I am supposed to plot the 3x3's but the professor made a big deal in class last week. Oh well, I am just running the program for the eigen values and eigenvectors and calling it a night. I still need to do a double mixing tank problem in the morning (god damn I love the week before the end of the semister).

Brain hurting...flashbacks of studying and deadlines...must drink beer... I remember my final for that class. We had to make solitare. In three hours. It seems easy.... I got a "B". I couldn't get the rows to lock, and you could cheat like crazy. Seems like forever ago...

You should really think of Jenn and just call ya yutz. You know the smart physics/science/astronomy gal I shack up with?