Added method to extract a sampled subset
Added method to extract a sampled subset

poolio/thunder,jwittenbach/thunder,zhwa/thunder,kunallillaney/thunder,pearsonlab/thunder,kunallillaney/thunder,broxtronix/thunder,mikarubi/thunder,j-friedrich/thunder,oliverhuangchao/thunder,kcompher/thunder,mikarubi/thunder,j-friedrich/thunder,zhwa/thunder,thunder-project/thunder,poolio/thunder,oliverhuangchao/thunder,broxtronix/thunder,pearsonlab/thunder,kcompher/thunder