n mchn lrnng nd pttrn rcgntn, ftr s n ndvdl msrbl prprty r chrctrstc f dt st. Chsng nfrmtv, dscrmntng, nd ndpndnt ftrs s crcl t prdc ffctv lgrthms fr pttrn rcgntn, clssfctn, nd rgrssn tsks. Ftrs r slly nmrc, bt thr typs sch s strngs nd grphs r sd n syntctc pttrn rcgntn, ftr sm pr-prcssng stp sch s n-ht ncdng. Th cncpt f "ftrs" s rltd t tht f xplntry vrbls sd n sttstcl tchnqs sch s lnr rgrssn.