Estimating memory usage of expressions

*To*: mathgroup at smc.vnet.net*Subject*: [mg108965] Estimating memory usage of expressions*From*: Jim Lambaugh <lambaugh at gmail.com>*Date*: Thu, 8 Apr 2010 08:03:13 -0400 (EDT)

Hi Is there a way to estimate how many bytes the different expressions in Mathematica take from the memory? For example I wish to know how many bytes a NxN matrix with real entries is, the list of its eigenvectors, eigenvalues etc. I know of the command "ByteCount", but the results I get are not consistent, i.e. a list of 1 integers does not take up the same amount of memory as one single integer etc. So: Is there a way to estimate these things? I'm running on a 32-bit system (if that makes a difference).