matlab 包络线

在Matlab中，可以使用不同的方法来计算和绘制包络线。其中一种方法是使用envelope函数，它可以返回输入序列的上下包络线。这个函数首先移除序列的均值，然后计算包络线，最后再把均值加回来。如果输入序列是一个矩阵，那么每一列的包络线是独立计算的。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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