TimeLLM - Time Series Forecasting Model

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Adrien, this approach will not work well. We have done exactly that. The problem is LLM weights are a statistical measure of language usages. Even if you fine tuned or prompting it with translated time series vectors, it only has a small % of weight that are relevant to time series. We chose to train a transformer from scratch, how scratch it is, is the key to practicality.

ipsdon
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yeah...they dont explain the dataset construction and testing procedure in depth.
if you sample training/testing data at time t and take the next (input, target) sample from t+1 often not much changes, so a persistent estimator (y(t+1) = y(t)) is quite good, i.e. the task is not as hard as when you would move to t+H sample.
Think about temperature and how little it changes now vs next 10 min. Even if that part is fine i.e. with large variation, there is a serious tendency to overfit if you sample like this.
Hope I am wrong

luster
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Look up Hurst. I started getting so excited when you realize the chaotic randomness of a particular time FRAME is determinable or predictable via particular frequencies

MlNECRAFT
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I don't know if i'm missing it in the paper but, we don't know if these backbone LLMs used some textual interpretation(time series events textualized) of these benchmark time series datasets during pretraining. If so, the backbone models could theoretically look into future where they shouldn't. No way to tell.

onurozkan
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Supposedly, stock prices follow a random walk in the short term. However, randomness is fundamentally unpredictable or it may not be randomness at all. Although a LLM may discover hidden variables, good luck with market timing when dealing with Markov chains.

videowatcher-dhil
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Yeah im going to have to go with never on this approach for me personally lol. But good luck to anyone that is able to get it to work for them.

Khari
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Do you have working tutorial for same method Adrien ?

yogeshagrawal
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Great video! Can you please share the codebase which I can try out on my timeseries dataset?

nasiksami
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The python code looks like i just creating a prompt with the sequence, just adding the sequence data was not good at all:
You are a helpful assistant that performs time series predictions.
The user will provide a sequence and you will predict the remaining sequence.

Please continue the following sequence without producing any additional text. Do not say anything like 'the next terms in the sequence are, just return the numbers. Sequence:

DennisRutjes