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I am new to this program and have never programmed before. I am not sure how to proceed at all when it comes to extracting the real and imaginary numbers from the eigenvalues (generated from 1000 2x2 matrices) and I don't know how to test for stable/unstable nodes, stable/unstable focus, centers, and saddle points.

I have already generated the 1000 2 by 2 matrices and generated every single eigenvalue from them. I have also plotted these eigenvalues. However, I don't know if my next bunch of coding is even on the right track.

for(i in 1:k){
  z=runif(4,min=-10,max=10)

points(Re(lambda[1]),Im(lambda[1]))
points(Re(lambda[2]),Im(lambda[2]))
points(Re(lambda[1]),Im(lambda[2]))
points(Re(lambda[2]),Im(lambda[1]))

The top section is part of the code I used to generate my matrices with random numbers from -10 to 10. I tried extracting the real and imaginary numbers like this but do I need to add more to the list of points. Also, after this how would I even test for the nodes and other points.

camille
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Karen Mok
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  • You're missing a closing bracket somewhere, and we don't have access to any of your data to be able to run this code, and can't see your output. [See here](https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example) on making an R question that's easy for folks to help with. – camille May 18 '19 at 14:41
  • My close vote as a typo is for not correcting the already identified syntactic error. I can always reverse it if that problem (and the lack of a [MCVE]) are corrected. – IRTFM May 18 '19 at 16:14

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