将一个函数作为参数传递给另一个函数 [英] Passing a function as argument to another function

问题描述

我看到一个像

sigma = 3*e-2
svmTrain(...,@(X,y)gaussianKernel(X,y,sigma),...);

这样的函数传递发生了什么，有人会解释吗?

What is going on with such a function passing, would someone explain ?

推荐答案

语法@(X,y) gaussianKernel(X, y, sigma)创建

The syntax @(X,y) gaussianKernel(X, y, sigma) creates an anonymous function by binding the third argument of this existing function guassianKernel(X, y, s) to specifically be the value sigma.

如果检查svmTrain函数签名，您会发现它允许传入一个函数，而该函数正是该匿名函数的去向.

If you inspect the svmTrain function signature, you'll see that it allows passing in a function, which is where this anonymous function is going.

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