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Hi~
Before configuring thingwatcher, I know that the Thingwatcher-excel-reader tool verifies the trining data as shown below.
java -jar thingwatcher-excel-reader.jar -i sample-data.xlsx -c Signal -o testing_C.xlsx --values-for-training 20 --max-lookback 6 --min-lookback 2 --certainty 99
I can not get a concept for lookback here.
Why set up a lookback window?
Can I know the number of lookback windows to set the min and max values of the lookback window?
Please let me know about the above~~~.
Hi Yong June
ThingWatcher works a little bit as follow:
The lookback window represent the amount of data ThingWatcher will use to make the prediction in step 2 above.
A usual range is max lookback 16 , min lookback 8, but this may need tuning.
Note that in the latest release of ThingWatcher it is NOT recommended to set the lookback window, instead ThingWatcher will automatically test a few and keep the optimal one. See the Help Center.
Since you are talking about the Excel tool, I would assume you are using an old beta release of ThingWatcher (The Excel tool no longer exist in latest release), I would recommend that you use the latest release to get the best results.
Hope this helps
Kind regards
Christophe