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write an Linear equation

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tusu
tusu 2014-11-2
评论： tusu 2014-11-3
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?

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回答（1 个）

Matt J
Matt J 2014-11-2
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.
  1 个评论
tusu
tusu 2014-11-3
how can I write this variable as x1 or x2.i,e xi..matlab can't deal with such equation.

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