Figure 5

Output of the factorization of the matrix representing the Bitcoin search time series. (a) Reconstruction error with respect to the number of iterations. The reconstruction error is given by the Frobenius norm of the matrix difference between the original and the approximated matrices. (b) Representation of the principal components with \({k=4}\). The growing component (red) represents the trend of the new adopters. The other 3 components are the fluctuating ones, and mostly represent what we call the early adopters