How to create a symmetrical matrix out of a column?

Question

For example, I want to turn the following column:

[90; 175; 600; 650; 655; 660] 

into the matrix:

[ 90, 175, 600, 650, 655, 66         


        

Answer 1

The hankel function can be used to generate the matrix:

col = [90; 175; 600; 650; 655; 660] 
result = hankel(col, flip(col));