其实如果想知道matlab中函数的作用,最好是help一下~,慢慢的你会发现它很强大的.\x0dhelp一下呗,事实证明你的确信是错的help absABS Absolute value.ABS(X) is the absolute value of the elements of X.When X is complex,ABS(X) is the complex modulus (magnitude) of the elements of X.这个就是它的作用,简单说就是求绝对值,比如ABS(-1) = 1,ABS(2) = 2.
