Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
Drexel University or The Math Forum.



Re: Matlab plot with matrix inverse coefficients
Posted:
Feb 18, 2013 6:27 AM


> Hi, > I will try to show you what i want to do > > V= 0:1:10 > > A=[10*V 20*V ; 30*V 40*V] > a=inv(A) > > I would get matrix: a= [a11 a12;a21 a22] > > plot(V;a11) > I want to plotting coefficients of the matrix > inverse, when the original matrix coefficients vary > with V,against V > > > three example matrixes: > V1=1 > A=[10*1 20*1 ; 30*1 40*1] > a=inv(A)=[ 0.2000 0.1000; 0.1500 0.0500] > > > > V2=2 > A=[10*2 20*2 ; 30*2 40*2] > a=inv(A)= [ 0.1000 0.0500 ; 0.0750 0.0250] > > > V3=3 > A=[10*3 20*3 ; 30*3 40*3] > a=inv(A)= [ 0.0667 0.0333; 0.0500 0.0167] > > and so on with other Vs > > so on the graph (V;a11) : first point (1; 0.20) > second point (2; 0.1) third point (3;0.0667) and so > on > > I am a student, i need to calculate elastic > properties of laminates, i have these huge matrices > and i have different angles to put in, from 0 to 90, > itns not done with a pen. > If I can figure it out how to do this i can write a > proper report :)
V=zeros(10,1); koeff=zeros(10,1); A=zeros(2,2); a=zeros(2,2);
For i=1:10, A=[10*i 20*i ; 30*i 40*i]; a=inv(A); V(i)=i; koeff(i)=a(1,1); end plot(V,koeff);
Best wishes Torsten.



