r语言elseif里面还可以套if吗
可以。R语言嵌套的ifelse语距：将一条If语句放在另一条If语句中，该语句作为嵌套的If else调用。Ifelse语句允许我们根据表达式结果（TRUE或FALSE）打印不同的if语句，执行不同的语句块，所以r语言ifelse里面还可以套if。R语言，一种自由软件编程语言与操作环境，主要用于统计分析、绘图、数据挖掘。绛旓細鍙互銆R璇█宓屽鐨刬felse璇窛锛氬皢涓鏉f璇彞鏀惧湪鍙︿竴鏉f璇彞涓紝璇ヨ鍙ヤ綔涓哄祵濂楃殑If else璋冪敤銆Ifelse璇彞鍏佽鎴戜滑鏍规嵁琛ㄨ揪寮忕粨鏋滐紙TRUE鎴朏ALSE锛夋墦鍗颁笉鍚岀殑if璇彞锛屾墽琛屼笉鍚岀殑璇彞鍧楋紝鎵浠r璇█ifelse閲岄潰杩樺彲浠ュif銆俁璇█锛屼竴绉嶈嚜鐢辫蒋浠剁紪绋嬭瑷涓庢搷浣滅幆澧冿紝涓昏鐢ㄤ簬缁熻鍒嗘瀽銆佺粯鍥俱佹暟鎹寲鎺樸
绛旓細绗竴娆′欢ifelse宓屽杩欎箞澶氱殑浣跨敤锛屼綘鏄窡鑷繁鏈変粐涔堬紝闈炶鎶婇棶棰樻悶鐨勮繖涔堝鏉傘傘傘傚缓璁敤if鏉′欢鍙ワ紝鎴栬匓ASE涓師濮嬫柟娉曚慨鏀广俰felse涓汉瑙夊緱宓屽涓や釜鏈浼樸傚啀澶氬繀鐒舵檿銆
绛旓細鐢变簬R璇█涓閫昏緫琛ㄨ揪寮忓拰鏉′欢璇彞杈冧负澶嶆潅锛屽洜姝や娇鐢╝lt鍑芥暟鍙互绠鍖栦唬鐮侊紝骞朵笖鏇村姞鏄撲簬闃呰鍜岀淮鎶ゃ傞氬父锛屽湪澶氶噸鏉′欢鍒ゆ柇涓紝濡傛灉浣跨敤澶氬眰if/else璇彞锛屼唬鐮佸祵濂楀眰鏁颁細寰堟繁锛屼笉鍒╀簬浠ｇ爜鐨勫彲璇绘у拰鍙淮鎶ゆс傝宎lt鍑芥暟鍒欏彲浠ュ湪涓琛屼唬鐮佷箣鍐呭疄鐜板涓閫夐」鐨勬潯浠跺垽鏂拰鐩稿簲鎿嶄綔锛屼粠鑰屾彁楂樹簡浠ｇ爜鐨勬晥鐜囧拰鏄撶敤鎬с
绛旓細",鐓х潃鍑犱綍甯冩湕杩愬姩鐨勫叕寮忕洿鎺ュ啓浠ｇ爜搴旇灏辫浜嗗惂锛屼唬鐮侀昏緫閮藉緢娓呮櫚銆備笅闈㈡槸鐓х潃杩欑墖鏂囩珷妯℃嫙涓娆＄殑浠ｇ爜锛屾ā鎷熷娆＄殑璇濓紝澶栭潰鍐嶅涓惊鐜簲璇ュ氨琛屼簡銆傜劧鍚庡啀鏍规嵁鍧囨柟璇樊(涓鑸敤杩欎釜鍋氬噯鍒欑殑澶)鏉ユ寫鏈濂界殑銆傝瘽璇翠綘鐨勬暟鎹渶濂藉埆鏄垎閽熸垨鑰3s鍒囩墖鏁版嵁锛屼笉鐒R杩欓熷害鍜屽唴瀛樺鍛涖侼 <- 2000 #妯℃嫙鐨勬牱鏈...
绛旓細濡傛灉杩欎釜鍑芥暟鏈韩杩斿洖鐨勪笢瑗挎槸涓涓猯ist锛岄偅鎴戜滑鍙互鐢$绗﹀彿鏉ユ彁鍙栵紝涓句緥濡備笅锛歴um_and_mean = function(a,b){ sum = a+b mean = (a+b)/2 return(list(sum = sum, mean = mean)) } # 褰撴垜浠琧all杩欎釜function鐨勬椂鍊檚um_and_mean(2,4)$sum # 缁撴灉绛変簬6sum_and_mean(2,...
绛旓細閭ｆ垜浠彲浠ョ敤$绗﹀彿鏉ユ彁鍙栵紝涓句緥濡備笅锛歴um_and_mean = function(a,b){ sum = a+b mean = (a+b)/2 return(list(sum = sum, mean = mean))} 褰撴垜浠琧all杩欎釜function鐨勬椂鍊 sum_and_mean(2,4)$sum # 缁撴灉绛変簬6 sum_and_mean(2,4)$mean # 缁撴灉绛変簬3甯屾湜瀵逛綘鏈夊府鍔╋紒
绛旓細md<-function(i){ if(i%%2==0){a=c("鍋舵暟")} else if(i%%2==1){a=c("濂囨暟")} else {a=c("闈炴暣鏁")} print(a)}
绛旓細else 鍚庝袱鍙ュ簲璇ュ姞{ } 鎴戜笅闈㈢殑灏辨病閿欎簡锛歮ysum<-function(x){a<-0;i<-1;repeat{ if(i>length(x)) break else {a<-a+x[i]; i=i+1} print(a)} }
绛旓細df <- data.frame(hospital, patients, costs)2銆佸垱寤烘柊鐨勫彉閲 df$totcosts <- df$patients * df$costs 3銆佹敼鍙樺彉閲忕殑鍚嶇О df$costs_euro <- df$costs df$costs <- NULL df$patients <- ifelse(df$patients==150锛100锛宨felse(df$patients==350,300锛孨A))4銆佸悎骞舵暟鎹泦 finaldt <- ...
绛旓細浣犵殑浠ｇ爜缂栧啓鏈夎 鍙嶆嫭鍙穧鎵撳浜 锛屽簲璇ユ槸杩欐牱锛屼綘鍐嶈瘯璇曘俧or(i in 1:length(textsimple$rateemotion)) { if(rateemotion[i]<-12){rateemotion[i] <- "VN"} else{if(rateemotion[i]<0) {rateemotion[i] <- "N"}} else{if(rateemotion[i]<12){rateemotion[i] <- "O"}} else...
