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Larger arrays or more dimensions? [message #68829]

Thu, 26 November 2009 05:49

David Higgins
Messages: 13
Registered: August 2009

Junior Member

I have a large data set which can be organised into sub categories,
where in each sub category an experimental variable was different.

(For anyone who cares, it's MRI data which are multiple echoes, in
multiple phases, in multiple dynamics, through multiple RF channels,
over multiple signal averages.)

The data is essentially a 3D set, repeated over these various degrees
of freedom ("phases", "dynamics", etc).

Here's my question. In terms of memory management, and program speed,
would it be better to have a 3D array, and extend the 3rd dimension
over and over for all these degrees of freedom, or would it be better
to use a multiple dimension array?

(I shall be preforming FFTs on the data.)

Thanks
Dave Higgins

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