Create a diagonal matrix from a vector

Hello,

Consider a 1x7 vector.

How can I create a 7x7 matrix where the main diagonal elements are zeros (m(i,i)=0) and m(i,j)=m(j,i)?

where,

i=1,...,7 the rows index

j=1,...,7 the columns index

[Matt J]

What is "m"?

[Matt J]

You should edit your post's title. This isn't really asking for a "diagonal matrix".

Answer 1

[Matt J]

 m(1)=0; 
 toeplitz(m)