[R] Selecting subsamples

[christian_mora@vtr.net]

Hi all,
I?m working with a dataset with 9 columns and 2000 rows. Each row represents
an individual and one of the columns represents the volume of that individual
(measured in cubic meters). I?d like to select a sample from this dataset
(without considering any probability of the rows) in which the sum of the
volume of the individuals in that sample >= 100 cubic m.
I?ll appreciate any suggestion
Thanks
CM