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This function computes the periodogram for each time series in the input matrix.
perd_get(Y)
A numeric matrix of dimension N x L, where each row is the periodogram of a time series.
N x L
A numeric matrix of dimension T x N, where each column is a univariate time series.
T x N
set.seed(123) Y <- matrix(rnorm(20), ncol = 4) perd <- perd_get(Y)
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