I have to create a matrix using only zeros, ones and eye

This is the matrix:

1 1 1 1 1

0 1 0 0 0

0 0 1 0 0

0 0 0 1 0

0 0 0 0 1

so far I wrote B=ones(1,5); C=eye(4,5); A=[B;C]

But this command didn't come out right. Can someone please help me.

Answer 1

[Kevin Phung]

your command A = [B;C] concatenated them vertically.

Try:

C = eye(5)
C(1,:) = 1; % turns every element along the first row to 1.

[Stephen23]

>> C = eye(5);
>> C(1,:) = 1
C =
   1   1   1   1   1
   0   1   0   0   0
   0   0   1   0   0
   0   0   0   1   0
   0   0   0   0   1

[Kevin Phung]

I would like to clarify that I made the exact same changes right before I saw your comment!

Originally I had something like

C(1,:) = B;

Answer 2

[Rob Purser]

A = eye(5);

A(1,:) = ones(1,5);