How to get the exact value in final result

How to get the exact value in final result, it's shows like (0.685577670878144 - 4.31922663726209e-253i)

[Meghana Dinesh]

What are you expecting?

[Walter Roberson]

And what calculation are you doing?

[eswarsakhamuri]

I expecting the final result are 06855, 2.446369 like this. I calculate the eigenvalue.

Answer 1

[Walter Roberson]

You will need to use the symbolic toolbox to get the exact result. You will need to pass exact inputs into the symbolic eig function, so you will need to determine what the exact value is that corresponds to each of your floating point inputs. For example is 1.23 exactly 123/100 or is 1.23 representing the range 1225/1000 inclusive to 1235/1000 exclusive? Only if you have exact inputs can you hope to get out an exact result.

Answer 2

[Stalin Samuel]

from the complex result (0.685577670878144 - 4.31922663726209e-253i) you can extract the real value by

real(0.685577670878144 - 4.31922663726209e-253i)