Eye command with a matrix

Use the eye command to create the array A shown on the left below. Then use the
colon to address elements in the arrays and the eye command to change A to match the array
shown on the right.

http://i49.tinypic.com/20go38i.jpg

So far I have tried

A=eye(7,7)
A=[2,2,2,0,5,5,5;2,2,2,0,5,5,5;3,3,3,0,5,5,5;0,0,0,1,0,0,0;4,4,7,0,9,9,9;4,4,7,0,9,9,9;4,4,7,0,9,9,9]

to match the array i did

B=[A eye(7,0)]

[Image Analyst]

So? What's wrong with that? It produces the "A" array you want. Do you have a question? I'm not sure what B is for.

[marie]

because it asks to use the colon to address elements in the arrays I'm not sure if A=[2,2,2,0,5,5,5;2,2,2,0,5,5,5;3,3,3,0,5,5,5;0,0,0,1,0,0,0;4,4,7,0,9,9,9;4,4,7,0,9,9,9;4,4,7,0,9,9,9] is right

and the B is just to give the new array a name

[Sean de Wolski]

I don't see any correlation between an identity matrix and that matrix B.

If you need to use colon:

I = eye(7);
I(1:2,1:3) = 2;
I(1:2,5:7) = 5;

etc. until it's filled up.

[Youssef Khmou]

its right, are you sure its "eye" not "ones " ?

[marie]

when I do I(:3,1:3) = 3 it gives me an error did i use the wrong command?

[Santosh]

colon is a vectorization operator whose usage is m:n. :3 here is not correct.

[marie]

I got it thank you!