topic Re: Dynamic Time Warping DTW in Discussions

Dynamic Time Warping DTW

RonB — Sun, 23 Sep 2018 11:11:39 GMT

I'm a bit confused about how to use DTW.

My data ~300K rows with:

1st column - test number 1 to 4

2nd column - time. For each test, time starts at 0 and goes up in increments of 0.2 ms.

Eight columns of measurements.

Rows are ordered by test and time.

What is the proper way to align with DTW?

Thanks

Re: Dynamic Time Warping DTW

txnelson — Sun, 23 Sep 2018 12:52:57 GMT

The Functional Data Explorer Platform allows for multiple data table formats to be used. From your description, your data appears to be in a Stacked format.

Specifying your measurement columns as the Y variables, and your Test column as the ID variable, you should be able to get your response.

I suggest you read the Functional Data Explorer section in the "Predictive and Specialized Modeling" book.

Help==>Books==>Predictive and Specialized Modeling

Re: Dynamic Time Warping DTW

RonB — Wed, 26 Sep 2018 06:19:33 GMT

Thanks, that helped.
Alas, DTW on my complete data set (300K rows) gives an error "to process DTW". No such error when I DTW a smaller subset. Any idea what might cause that error?

Re: Dynamic Time Warping DTW

txnelson — Wed, 26 Sep 2018 11:10:19 GMT

I assume there is a data issue. My suggestion is to contact JMP support directly
Support@jmp.com