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Results of the estimation methods for the spring-mass model. (a) The ground-truth matrix. (b) The estimated connection matrix from the correlation method (16% error). (c) The estimated connection matrix from the inverse covariance method (53% error). (d) The estimated connection matrix from the SRPM method (0% error). In panels a–d, black denotes either a diagonal element or a connectivity between two masses via a spring, and white denotes no connectivity.
