What does this error mean?

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Rebekka Klara Gasser
评论： Rebekka Klara Gasser 2015-10-7
I get an error when calling the eig() function.
First I thought my matrix is somehow 'bad' for computing the eigenvalues.
But even if I just type
eig(eye(4))
I get the following error:
"Subscript indices must either be real positive integers or logicals."

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Titus Edelhofer
Titus Edelhofer 2015-10-7
Hi,
this means, that using eye(4) is not valid for indexing (which is true, since it contains zeros). This implies, that you have a variable named eig, that shadows the function.
whos eig
probably tells you that eig is a variable. Remove it
clear eig
and then eig(eyes(4)) should do what you expected.
Titus
  1 个评论
Rebekka Klara Gasser
Rebekka Klara Gasser 2015-10-7
Ah I see!
You're right. I named a variable 'eig' which was not really clever.
Thank you!

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