% Use cvpartition to stratify the sample via classes, so that the % train and test sets have similar class distribution. rng("default") % For reproducibility c = cvpartition(alldata.(response),"Holdout",0.20); x_train=alldata(training(c),:); x_test=alldata(test(c),:); % Create rando...
It plays a key role in determining the clinical- and cost-effectiveness of a new intervention and whether it is recommended for use in standard of care. The assessment of overall survival usually requires trial participants to be followed up for a long period of time. In this time, they ...
Say for example 1200 people are sampled, as is common, and we stratify by race, That would mean we design the sample to include about 160 Black people. But anyone who wondered about the small sample overall would be even more puzzled as to why 160 African-Americans is “representative.”...