定义一个函数在文件命名acceptVariableNumInputs.mthat accepts a variable number of inputs and displays the values of each input.

typeacceptVariableNumInputs

function acceptVariableNumInputs(varargin) disp("Number of input arguments: " + nargin) celldisp(varargin) end

Call the function with several inputs.

acceptVariableNumInputs(ones(3),'some text',pi)

Number of input arguments: 3 ans{1} = 1 1 1 1 1 1 1 1 1 ans{2} = some text ans{3} = 3.1416

定义一个函数在文件命名definedAndVariableNumInputs.mthat expects two inputs and accepts an additional number of inputs.

typedefinedAndVariableNumInputs

function definedAndVariableNumInputs(X,Y,varargin) disp("Total number of input arguments: " + nargin) formatSpec = "Size of varargin cell array: %dx%d"; str = compose(formatSpec,size(varargin)); disp(str) end

Call the function with several inputs.

definedAndVariableNumInputs(7,pi,rand(4),datetime('now'),'hello')

Total number of input arguments: 5 Size of varargin cell array: 1x3

Call the function with two inputs.vararginis an empty cell array.

definedAndVariableNumInputs(13,42)

Total number of input arguments: 2 Size of varargin cell array: 0x0

定义一个函数在文件命名variableNumInputAndOutput.mthat accepts a variable number of inputs and outputs.

typevariableNumInputAndOutput

function varargout = variableNumInputAndOutput(varargin) disp(['Number of provided inputs: ' num2str(length(varargin))]) disp(['Number of requested outputs: ' num2str(nargout)]) for k = 1:nargout varargout{k} = k; end end

Call the function with two inputs and three outputs.

[d,g,p] = variableNumInputAndOutput(6,'Nexus')

Number of provided inputs: 2 Number of requested outputs: 3

d = 1

g = 2

p = 3

Call the function again with no inputs or outputs.

variableNumInputAndOutput

Number of provided inputs: 0 Number of requested outputs: 0

In a file in your working folder, create a wrapper to the plot function that plots a red line. Theredplotfunction accepts a variable-length input argument list and returns a variable-length output argument list. It sets the line color to red, and forwards other input values to theplot函数。这个函数包装器允许您不是sredplotthe same inputs asplotand not specify that the line color is red.

typeredplot.m

function varargout = redplot(varargin) [varargout{1:nargout}] = plot(varargin{:},'Color',[1,0,0]); end

Useredplotto create a line plot.

x = 0:pi/100:2*pi; y = sin(x); redplot(x,y)

Callredplotagain, and specify input and output arguments to forward to theplot函数。

h = redplot(x,y,'Marker','o','MarkerEdgeColor','green');