memuse-package

The package gives the user the size (memory usage) of an unallocated, dense, 
  in-core numeric object (matrix/vector). The output is an S4 class object 
  that can be manipulated to be presented in different ways (different units, 
  short/long versions of those units, etc.). Details about these various 
  options are outlined in the rest of this manual, as well as the package 
  vignette.

package

How much ram do you need to store a 100,000 by 100,000 matrix?
  Learn the scintillating answer to this and many more such questions with
  the memuse package.  This package gives the user the size (memory usage) 
  of an unallocated, in-core, dense, numeric matrix.  The output is an S4 
  class object that can be manipulated to be presented in different ways 
  (different units, short/long versions of those units, etc.).  The package
  offers similar functionality to that of R's object.size() function, with 
  the key difference being that memuse does not require an object to already
  be allocated.  So one can determine the size of enormous matrices even
  from a laptop.

memuse-package: Core memuse Classes and Methods

Description

Arguments

Details

References