Convert file to matrix

I have this file , which is a text file:

Basically I need to write a script that will open this file, read it, delete the first line and convert the rest to a matrix where the zeros outside the main diagonal become INF.

Answer 1

[Walter Roberson]

readmatrix()

[Maria Nogueira]

but then how do i delete the first line ?

[Walter Roberson]

readmatrix will skip it automatically.

[Maria Nogueira]

oh I didn´t know that! thank you so much