function-handle | 易学教程

Matlab mex-file with mexCallMATLAB is almost 300 times slower than the corresponding m-file

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问题 I started implementing a few m-files in C++ in order to reduce run times. The m-files produce n-dimensional points and evaluate function values at these points. The functions are user-defined and they are passed to m-files and mex-files as function handles. The mex-files use mexCallMATLAB with feval for finding function values. I constructed the below example where a function handle fn constructed in the Matlab command line is passed to matlabcallingmatlab.m and mexcallingmatlab.cpp routines.

What is a function handle and how is it useful?

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Can somebody explain to me the meaning of the @ (function handle) operator and why to use it? The function handle operator in MATLAB acts essentially like a pointer to a specific instance of a function. Some of the other answers have discussed a few of its uses, but I'll add another use here that I often have for it: maintaining access to functions that are no longer "in scope". For example, the following function initializes a value count , and then returns a function handle to a nested function increment : function fHandle = start_counting(count) disp(count); fHandle = @increment; function

What is a function handle and how is it useful?

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问题 Can somebody explain to me the meaning of the @ (function handle) operator and why to use it? 回答1: The function handle operator in MATLAB acts essentially like a pointer to a specific instance of a function. Some of the other answers have discussed a few of its uses, but I'll add another use here that I often have for it: maintaining access to functions that are no longer "in scope". For example, the following function initializes a value count , and then returns a function handle to a nested

What is the @ operator in MATLAB?

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I've only used MATLAB 6.5 before. I got some programs that is using '@'. Can someone tell me what is it? By the way, does MATLAB 6.5 support this operator? The @ operator creates a function handle, something that allows you to easily create and pass around a function call like a variable. It has many nice features, none of which are available to you unfortunately. This is because as you suspect, it was not introduced into matlab until version 7, the release immediately after yours. Royi It used to declare Anonymous Functions in Matlab. I think the terms is " Function Handle ". Practically it

What is the @ operator in MATLAB?

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问题 I\'ve only used MATLAB 6.5 before. I got some programs that is using \'@\'. Can someone tell me what is it? By the way, does MATLAB 6.5 support this operator? 回答1: The @ operator creates a function handle, something that allows you to easily create and pass around a function call like a variable. It has many nice features, none of which are available to you unfortunately. This is because as you suspect, it was not introduced into matlab until version 7, the release immediately after yours.