How to create a labelled matrix in LaTeX?

[rwinston]

Hi

does anybody know how to create a labelled matrix in LaTeX? By which I mean something like this:
a b
a [ 1 0 ]
b [ 0 1 ]

Where the inner elements are within the braces, but there are tabular label elements for the rows and columns (a and b). Cant get it too look right!

Cheers

 

[alphysicist]

Hi rwinston,

If you don't mind parenthesis instead of braces you can use bordermatrix from plain TeX:

$$\bordermatrix{&a_1&a_2& a_3 \cr<br /> b_1 & 1 & 2 & 3 \cr<br /> b_2 & 2 & 3 & 4 \cr<br /> b_3 & 3 & 4 & 5 \cr}$$


$$\bordermatrix{&a_1&a_2\cr<br /> b_1 & 1 & 2 \cr<br /> b_2 & 2 & 3 \cr}$$


$$\bordermatrix{&a_1&a_2 \cr<br /> b_1 & 1 & 2 \cr<br /> b_2 & 2 & 3 \cr<br /> b_3 & 3 & 4 \cr}$$

There is also a newer kbordermatrix package that you can use that gives more options (such as being able to change the delimiters).

 

[rwinston]

Thanks! Thats exactly what I need!