如何将一组未知数量的参数传递给 MATLAB 中的函数? [英] How can I pass a set of an unknown number of arguments to a function in MATLAB?

问题描述

当您有一个接受可变数量参数的函数(如 ndgrid)时，您如何将任意参数列表传递给该函数?

When you have a function that takes a variable amount of arguments (like ndgrid), how can you pass an arbitrary list of arguments to that function?

例如我想让它有时我将两个向量传递给 ndgrid 并得到两个矩阵，即，

For example I want to make it so that sometimes I pass two vectors to ndgrid and get out two matrices, i.e.,

[X1,X2] = ndgrid(x1,x2);

但有时我可能有更多的 X，所以我会想要

But other times I might have more X's, so I'll want

[X1,X2,X3,X4] = ndgrid(x1,x2,x3,x4)

1. 是否有任何类型的结构可以用来存储未知数量的参数列表，然后将该列表提供给函数?而且，
2. 当您不知道会有多少输出时，有没有办法从函数中检索所有输出?

推荐答案

要将可变数量的输入传递给现有函数，请使用具有扩展功能的元胞数组，如下所示:

To pass in a variable number of inputs to an existing function, use cell arrays with expansion, like this:

x = 1:10;
y = randn(size(x));
plotArguments = {'color' 'red' 'linestyle' '-'};
plot(x, y, plotArguments{:});

或

plotArguments = {1:10 randn(1,10)  'color' 'red' 'linestyle' '-'};
plot(plotArguments{:});

您可以使用相同的技巧接收多个输出.唯一困难的部分是记住正确的符号.

You can use the same trick to receive multiple numbers of outputs. The only hard part is remembering the correct notations.

numArgumentsToAccept = 2;
[results{1:numArgumentsToAccept }] = max(randn(100,1));

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