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check_data checks the data.
check_data
check_data(data, p)
Checks the data and tries to correct it. Throws an error if something is wrong and returns the corrected data otherwise.
a matrix or class 'ts' object with d>1 columns. Each column is taken to represent a univariate time series. Missing values are not supported.
'ts'
d>1
a positive integer specifying the autoregressive order