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禡]Functions^]O M ɮת@ءAiHJܼơAñNB⵲GeܿXܼơABL{ҲܼͪƳsb禡u@ŶAä|M MATLAB 򥻤u@ŶܼƬۤл\C]A禡SOAΩj{XAL|ϱz{XҲդơ]Modularized^é@PiC

|ҨӻAfunc1.m NO̩Ҽg@Ӥp禡A\OX@VqȡAڭ̥i type Oܨ䤺eG

>> type func1.m function average = func1(vector) average = sum(vector)/length(vector); % p⥭

禡Ĥ@Cu禡wqCv]Function Definition Line^AwqF禡W١]Yfunc1A̦nMɮתDɦWۦP^BJ޼ơ]Y vector^BX޼ơ]Y average^A function hrAN M ɮ׬@禡CĤGCh禡D]Function Body^AWd禡BL{AëwX޼ƪȡCIs禡AiJpUG

>> vec = [1 5 3]; >> ave = func1(vec) ave = 3

[W禡uuWUv]On-line Help^Aib禡wqCU[JѡAҦpb禡 func2.mAڭ̤w[WFuWUGG

>> type func2.m function average = func(vector) % FUNC2 A simple function with a single help line. % % Usage of this function: % output = func2(input) % "output" is the average of the input vector "input". % Roger Jang, 19991123. average = sum(vector)/length(vector); % p⥭

b禡wqC᪺sѡ]Hu%v}Y^AY禡uWUAYb MATLAB Juhelp 禡DɦWvAYiݨoǻUAҦpG

>> help func2 FUNC2 A simple function with a single help line. Usage of this function: output = func2(input) "output" is the average of the input vector "input".

]AziHNҦ禡A]tΪkBtkBѦҸơB̫קB@̵TAgJuWUAHQϥΪ̡]iNOzۤv^dݡC

Hint
bWҤAuRoger Jang, 19991023våe{bfunc2禡uWUAoϦ]CMeѤwAäݩusvѡC

b@禡uWU̡A̭nNOĤ@CAo@CS٬uH1 Uv]H1 Help^AzϥΡulookfor keywordvhd MATLAB OɡAMATLAB ƹWNOHҵrMjM|WҦ MATLAB 禡uH1 Uvi@@AHXOCҦpG

>> lookfor 'help line' FUNC2 A simple function with a single help line.

Hint
zwˤFܦhucAάOzjM|ܪɡAlookforOɶNi|C

YzܦhMYά禡AziHNoǨ禡s@lؿAñNؿ[JjM|A MATLAB bؿAi榹ؿ禡C [J|Ai addpath OA|AirmpathOAbbحzC~Az]iHإߤ@ؿuWUAuݦbؿU[J@Swɮסu Contents.mvAɮץu]tUrAPɨCCݥHu%v}YAMATLAB |bzJuhelp ؿW١vɡAܦbuؿW١vU Contents.m UC

MATLAB 禡W٩MܼƦWٳۦPGue 31 Ӧr]MATLAB 5.x^Ϋe 63 Ӧr]MATLAB 6.x M 7.x^AӥBݥH^r@}YC~AɮצW٩M禡W٤PɡAڭ̤iɮצW٩IsɮסA禡WٱNQC]b MATLAB 6.x M 7.xAAiHϥ namelengthmax OӬdܼƦW٪̤jסC^

@Ө禡iHhJοXAҦpGfunc3.m iӿJòͨӿXAoӿXOOӿJVqȡA{XiܦpUG

>> type func3.m function [ave1, ave2] = func3(vector1, vector2); ave1 = sum(vector1)/length(vector1); ave2 = sum(vector2)/length(vector2);

func3.m 嫬Is覡pUG

>> [a, b] = func3([1 2 3], [4 5 6 7 8]) a = 2 b = 6

~Ab@禡Aڭ̥iΤܼ nargin nargout ӨMw禡ڿJMXܼƪӼơADn\ରG

Hint
  • nargin: Number of Arguments of Inputs
  • nargout: Number of Arguments of outputs

ҦpGWz禡 func3.m ig func4.mA䤺epUG

>> type func4.m function [ave1, ave2] = func4(vector1, vector2) if nargin == 1, % u@ӿJܼ ave1 = sum(vector1)/length(vector1); end if nargout == 2, % ӿXܼ ave1 = sum(vector1)/length(vector1); ave2 = sum(vector2)/length(vector2); end

func4.m NiH@өΨӿJܼơG

>> [a, b] = func4([1 2 3], [4 5 6 7 8]) a = 2 b = 6 >> c = func4([1 3 5 7 9]) c = 5

MATLAB 禡iǰewƥتJ޼ƩMX޼ơAѩξ|hAGbAحzA쪺Ū̡AiѦ varargin M varargout uWUC

Hint
q~WӬݡAMATLAB 禡ܼƶǻkOҿתCall by ValueAYb禡u@ŶAҦJܼƧOu@Ŷ]Parent Workspace^@A]b禡oǿJܼơAä|vTu@ŶܼơCbڹB@WAYJܼƥQקAhMATLAB ĥΡCall by ReferenceA_hAhĥΡCall by ValueC

Ynb禡D禡ɮצW١Ai mfilename OFYnb禡D禡JܼƦW١Ai inputname OA쪺Ū̡Ai help mfilename help inputname oԲӪTC


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