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Help with Symbolics

Help with Symbolics

Help with Symbolics

Hi all,

I need to make some variables appear as symbols so I can get the answer in terms of them.  When i make them symbolic however, it makes the whole matrix they're in symbolic, even though they only appear in two columns.

How can I make the other values in the matrix normal?

Example to explain:

syms E A

K=[1 1 2 E A
   2 1 3 E A
   3 2 3 E A];

When I then try to use the number values, in cases such as:
B=A(K(2,1),2)  (Assuming that A is a square m by n matrix.)
This gives an error as K(2,1) is the symbol '2' and not the integer '2'.

How can i make it read like an integer? Or make it not be a symbol?

I hope this makes sense, thanks in advance

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