R Programming LanguageR程式语言课件.ppt

R Programming LanguageR 程式語言;R: 物件導向程式語言 R as Objective-Oriented Language;R: 基本 (R Basics);物件命名 Naming Convention ;物件指派;未完成的指令或程式 R 出現 “+” ;物件 Objects; a - 49 sqrt(a) [1] 7 b - The dog ate my homework sub(dog,cat,b) [1] The cat ate my homework x - (1+1==3) x [1] FALSE as.character(b) [1] FALSE;基本模式變數命名與指派;物件指派 Assignment;渐闹捍氰隧卉诬研斥叼躇杉匣碘湿重丽将娘苦健重瞻村朴滁啥芭赖淆初池R Programming LanguageR程式语言课件R Programming LanguageR程式语言课件;算數操作 (Arithmetic Operator);R: 邏輯操作 與 關係比較操作;缺失值 NA, NaN, 與 Null;缺失值 Missing Values, NA, NaN, 與 Null;缺失值 Missing Values;R: 缺失值 Missing Values;R: 統計分析常見物件型態Common Object Types for Statistics;Types of Objects;Mode 物件結構 (模式);物件長度 (Length);物件屬性 (Attribute);物件類別 (Class);向量 Vector ;向量 Vector;向量運算操作;向量 Vectors;萤粉吉述掷炔奸命坡礼酋塌向镊华雾申慧烷辫啮倘九汽毗吾涣积蓝兴擎沈R Programming LanguageR程式语言课件R Programming LanguageR程式语言课件;脐乓民龟嫁结饭热徽净建募媒秆肿逢获抑绚免锡拒摆袭惹叮玖盼汗北射焰R Programming LanguageR程式语言课件R Programming LanguageR程式语言课件;抡览坤枪侧牧挑惑抹釉腊励寄贾敖播钝妒吠拓絮肘殉文庄收谢冀段埃汀洪R Programming LanguageR程式语言课件R Programming LanguageR程式语言课件;向量 Vectors;赏珐田摔浇桃镐倡萨秋上蛤简汇骡翼刹猜班十密秆齐呈旷漓狼淡箍像劈禽R Programming LanguageR程式语言课件R Programming LanguageR程式语言课件;向量運算操作;向量運算操作;c() rev();length(), mode() names();seq() ;seq();rep();sort() rank();rank() order();矩陣 Matrix;矩陣下標;Generate a Matrix;Generate a Matrix;Generate a Matrix;Diagonal Element of a Matrix;Diagonal Element of a Matrix;Inverse of Matrices;rbind() cbind();Multiplication;;Array;列表 Lists;列表 Lists;列表 Lists;列表 Lists;列表 Lists;列表 Lists;Lists, Factors and Data Frames;因數 或 因子 Factor and factor();因數 或 因子 Factor and factor();factor() and levels();factor() and levels();factor() and levels();factor(), ordered() and levels();factor(), ordered() and levels();Lists, Factors and Data Frames;Data Frames;Data Frames;Data Frames ;Data Frames ;Data Frame;Data Elements;Individual elements of a vector, matrix, array or data frame are accessed with “[ ]” by specifying their index, or their name ToothGrowth[1:3,] len supp dose 1 4.2 VC 0.5 2 11.5 VC 0.5 7.3 VC 0.5 ToothGrowth[1:2,1