Many thanks Brad.
Indeed I want to plot a graph like as below image :
For my below data.
OBS = {0.670994153`, 0.671010714`, 0.67267419`, 0.668473616`,
0.661080435`, 0.652673783`, 0.653138756`, 0.655948918`,
0.661869409`, 0.638224869`, 0.638979982`, 0.639642394`,
0.642630481`, 0.643617257`, 0.644126419`, 0.701789017`,
0.698119952`, 0.706185231`, 0.707290186`, 0.65831415`, 0.694930072`,
0.701154503`, 0.711700059`, 0.718360653`, 0.657258235`,
0.666121701`, 0.679998013`, 0.699887249`, 0.722880638`,
0.751875398`, 0.704695709`, 0.73018907`, 0.742919112`, 0.764319337`,
0.77218462`, 0.774527334`, 0.71726397`, 0.719690721`, 0.75008694`,
0.768600531`, 0.778274357`, 0.779502355`, 0.782995775`,
0.573973274`, 0.598033955`, 0.599596501`, 0.602287296`, 0.604525679`}
RF = {0.661364448`, 0.659606784`, 0.655400831`, 0.662659672`,
0.66587247`, 0.654697718`, 0.645638171`, 0.655319833`, 0.669298311`,
0.645871986`, 0.644753991`, 0.646067736`, 0.651070895`,
0.657280147`, 0.655479775`, 0.671155538`, 0.679573807`,
0.699874225`, 0.701011724`, 0.676778482`, 0.702745674`,
0.707316941`, 0.711617827`, 0.71765958`, 0.693996288`, 0.693463408`,
0.692490649`, 0.701695076`, 0.722543184`, 0.741700268`,
0.71271051`, 0.725881931`, 0.737262952`, 0.749573359`, 0.76150919`,
0.756232284`, 0.628167019`, 0.628167019`, 0.727129395`,
0.749505303`, 0.756175837`, 0.74753598`, 0.748973776`, 0.590215667`,
0.615802687`, 0.619031332`, 0.613749052`, 0.612289644`}
DL = {0.655124672`, 0.656104543`, 0.659458499`, 0.680739677`,
0.672725429`, 0.653227846`, 0.653111463`, 0.655929073`,
0.660622501`, 0.649022756`, 0.649752214`, 0.650428697`,
0.652423858`, 0.65264585`, 0.652678576`, 0.680767624`, 0.664989505`,
0.67934401`, 0.681090918`, 0.662133764`, 0.69541549`, 0.701374117`,
0.713501389`, 0.722474241`, 0.682516396`, 0.683915727`,
0.686621471`, 0.698980624`, 0.726416994`, 0.761214231`,
0.717239152`, 0.739817963`, 0.751380972`, 0.774232118`,
0.781827666`, 0.783876661`, 0.60584739`, 0.685220569`, 0.755807031`,
0.766897467`, 0.773773527`, 0.77471428`, 0.777444653`,
0.599312425`, 0.60054583`, 0.601741588`, 0.604204445`, 0.60645107`}
GBM = {0.673667336`, 0.670689967`, 0.664935155`, 0.673166307`,
0.673166307`, 0.669390466`, 0.659117181`, 0.66762394`, 0.673754702`,
0.659117181`, 0.661994628`, 0.659664303`, 0.666310085`,
0.66781346`, 0.66781346`, 0.673166307`, 0.683694492`, 0.697433529`,
0.698704237`, 0.666966031`, 0.697433529`, 0.697433529`,
0.701317188`, 0.710124684`, 0.698722419`, 0.698722419`,
0.698722419`, 0.703414781`, 0.705398209`, 0.724737302`,
0.704864635`, 0.715431363`, 0.725169486`, 0.731770717`,
0.732912709`, 0.732912709`, 0.712080891`, 0.712080891`,
0.721412104`, 0.7348725`, 0.73750462`, 0.737907344`, 0.737907344`,
0.613436498`, 0.630101611`, 0.630101611`, 0.630101611`, 0.630101611`}
GLM = {0.67643252`, 0.676587775`, 0.675891007`, 0.659645388`,
0.669297572`, 0.676314679`, 0.675275772`, 0.672047931`,
0.666208799`, 0.673838919`, 0.672346143`, 0.671263169`,
0.667131673`, 0.665887778`, 0.665258733`, 0.659820366`,
0.677046451`, 0.675045849`, 0.674622302`, 0.68794523`, 0.702484833`,
0.703854302`, 0.705497018`, 0.706097072`, 0.631234361`,
0.649971119`, 0.67488782`, 0.701420163`, 0.721549322`, 0.735573687`,
0.665326529`, 0.722588965`, 0.74039248`, 0.760572687`,
0.765648764`, 0.766954752`, 0.577549799`, 0.609922778`, 0.7442199`,
0.777977871`, 0.790116577`, 0.791450555`, 0.795016012`,
0.650052304`, 0.600401464`, 0.591253918`, 0.573007039`,
0.555148866`}