write an Linear equation

Hi,

I have an eqn like this

xi+zihi+wi-wizi<=xj+23xij+23yij..........{1}

now, here i=1 and j=2, so it shall be

x1+z1h1+w1-w1z1<=x2+23x12+23y12

now if h1=4 and w1=5

then it becomes

x1+4z1+4-5z1<=x2+23x12+23y12

or

x1-z1-x2-23x12-23y12<=-4............{2}

is it possible to generate eqn(2) in matlab from eqn(1),if I know value of i and j and w1 and h1? means is this subtraction can be done? i.e 4z1-5z1=-z1?

Does matlab allow dealing with such equations with xi,yi,wi,hi as variable?

Answer 1

[Matt J]

You can do things like this

      >> linsys=@(a,b,c) [a b;1 c]   ;

      >> A=linsys(1,2,3)

      A =

           1     2
           1     3

The matrix A can now be used to describe a linear equality or inequality.

[tusu]

how can I write this variable as x1 or x2.i,e xi..matlab can't deal with such equation.