Add lines and rows around an array

7 views (last 30 days)
Is there a simple way to add single lines and rows around an existing array, like a boundary box.
E.g.:
1 2 3 4
4 5 6 7
7 8 9 0
shoud go to:
11 11 11 11 11 11
11 1 2 3 4 11
11 4 5 6 7 11
11 7 8 9 0 11
11 11 11 11 11 11
I know that I can insert a line and row at position one, e.g. like here, and append a line and row at the end like here, but maybe there is a more efficient solution?

Accepted Answer

Alan Meier
Alan Meier on 6 Apr 2020
c = rand(3,3) %an example
a = zeros(3+2,3+2)+11;
a(2:4,2:4)= c

More Answers (0)

Categories

Find more on Matrices and Arrays in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by