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I am trying to solve a multimodal regression task. I have two types of time series available.
Both time series are sparsely and irregularly sampled, with continous timestamps. For each point in time, a target label is available. I would like to find a way to create a joined embedding of both data types, ideally regularly sampled, so it can be used as input for a standard RNN-block.
So far, I was not able to find a good approach for this problem.
More information is needed, e.g., samples of both data types would help.
-Is the meaning of the target variable(s) the same for both?
-What are the unit(s) of the timestamps (hourly, daily, weekly...)?
-Is the one-hot encoding based on the same information as the continuous data, if not, how do they differ?
One approach to equilibrating disparate time series is to aggregate by timestamp and merge based on time. This means taking disaggregated and irregular time series and aggregating them to a higher level, e.g., hourly time periods can be rolled up to daily, daily to weekly, etc.
Depending on how irregular the time series are, this may or may not regularize the information.
But in the absence of more information, this is speculation.
