当我lookfor phase的结果是
phase 计算复向量的相位 PHI=phase(G)
G is a complex-valued row vector and PHI is returned as its phase (in radians), with an effort made to keep it continuous over the pi-borders.
这意味着该方法的输出是展开的，但是如果我尝试unwrap(phase(PHI))，输出会变得不同。这是为什么？还没有phase返回展开阶段？
注意：phase在 System Identification Toolboxphase的 MATLAB 文档中找不到该命令。只是出现lookfor phase