eval() for user-defined matrices?

[the_verge]

Hi all,

Is there a way to implement eval("thing_x") if thing_x is a vector?  Or is
there some alternative command that will do the same thing?  For example:

thing_x = [1 3 6 9 0];
eval("thing_x")

returns "invalid vector index = 116"
instead of:

thing_x = 1 3 6 9 0

Any ideas on how to do this?  
Note:  I would like class(eval(thing_x)) to be double

Thanks,
Vergil
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