[&#10023;](../index.html)]
#A Wavelet Transform

<center><img style="width:85%;margin-top:-0.2em;margin-bottom:-0.2em"  src="../../figures/gulfstream_example2.png"></center>

<!--For bivariate data, `$z=u+iv$`, we have two transforms, `$u$` and `$v$` or the positive and negatively rotary transforms.-->
---
class: left, .toc[[&#10023;](../index.html)]
#The Basic Idea

The wavelet transform is essentially a stack (or set) of one-sided bandpasses at different frequencies.

We bandpass the time series at many d