TI calculator


Eigenvectors for real eigenvalues

For  Programmable TI calculators 

3 X 3 Matrix H

real eigVl HstoEGV

For(XX,1,3,1)

H-((EGV(XX))*ident 3)stoEE

(EE(3,3))+(1/3)stoEE(3,3)

EE^-1(little -1 in catalogue for inverse matrix)sto EA

EA*(1/3)stoEA

For(WW,1,3,1)

EA(WW,3)stoEEE(WW,XX)

End

End

EEE is matrix of eigenvectors for real eigenvalues.

To check the program, remove the word real before eigVl. Run the

program. Use the function Matrix Math eigVc on your matrix H.

Divide 1 by the bottom eigenvector of a column. Multiply the top and

second eigenvector by the answer. Use 1 for the bottom. EEE should be

the same.