How to use Dynamic Time Warping (dtw) as distance parameter for knnclassify?

Hello,

As the title says, I would like to use:

dtw

as the distance parameter for:

knnclassify

I am pretty sure this is possible in principle, and have found several convincing exaples online, who explicitly used MATLAB, but none report the code.

My goal is unsupervised (hierarchical) clustering based on DTW distance of a collection of time-series.

Thanks a lot!