how to express a set

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sir, my problem is i want to write ai belongs to A(1<=i<=N) where A={a1,a2,...aN}in matab.i have written this like:

 for A=1:N;
    if (1<=i<=N)
    ai=A;
    end 
end 
i am new to matlab .plz tell me this is right or wrong and if it's wrong then what to write..
Expecting a favorable reply.
Thanking u SUCHI

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Andy 2011-5-16

It is very unclear what you're trying to do, but it looks like you have a cell array A which is a vector of length n, and you want to have variables a1, a2, ..., an representing each element of your cell array. Is this correct? If so, don't do this. It is much better to keep your data in a cell array A and refer to it as A{i} rather than ai. Perhaps you should refer to http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F.

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