Add option for subset to threshold based on norm
Add option for subset to threshold based on norm

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