Comments (3)
I'm not sure if I understand your problem.
'V' is the size of the input, i.e., the number of input variables.
'internal_units' denotes the size of the reservoir, i.e., the number of output variables.
Therefore, the weights must have shape (V, internal_units), as they map the input from a space of dimensionality 'V' to a space of dimensionality 'internal_units'.
'N' is the number of samples. In reservoir computing (and generally in neural nets) the weights depend on the dimensionality of the samples, not on the number of samples.
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- N is the number of the time series in the dataset.
- T is the length of the time series, i.e., the number of time steps.
- V is the number of variables, i.e., how many quantities are measured at each time step. For example, if the time series describes a trajectory of an object in a 3D space, V=3 because you are measuring 3 coordinates at each time step. If the time series is univariate, then V=1.
You can read more about multivariate time series online. There are many tutorials and explanations.
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