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dmd_for_human_motion's Issues

关于模式的问题请教

您好,我是最近才接触Koopman,目前正在试图搞明白DMD,针对您/src/dmd.m中我有一个问题,就是求DMD mods的时候,在16行,其中VrSr都是对X的奇异值的右奇异矩阵和奇异值对角阵,为什么您在求modes的时候却用上了Y呢?Y*Vr/Sr的本意不是要求X的左奇异矩阵吗?为什么不是X*Vr/Sr呢?

还有一个问题想请教一下您,我最近花了好多时间也没搞明白,就是Koopman的三个重要的结果,eigenvalues, eigenfunctionsmodes是什么样的关系呢?我理解eigenvalues, eigenfunctions是近似Koopman的线性K矩阵的特征值和特征向量,那modes又是什么呢?我看了好几篇论文都没搞明白,modes好像是特征函数什么系数。

万分感谢,我是在知乎上看到您的讲解。

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