Modal analysis, Eigenvectors matrix plot

I need the 2,2 ; the 5,5 ; the 8,8 and the 11,11 part of the matrix to plot my modal forms. How can I take these elements? Need asap answer.

Thanks in advance

[Mathieu NOE]

https://fr.mathworks.com/matlabcentral/answers/28173-plot-eigen-vectors

Answer 1

[KSSV]

Read about plot.

Refer this: https://de.mathworks.com/matlabcentral/fileexchange/30970-natural-frequencies-buckling-loads-of-columns-using-finite-element-method