Figure 7
From: Prediction of employment and unemployment rates from Twitter daily rhythms in the US
Schematic figure of linear model. Linear representation of the datapoints by A and B corresponding to the two universal patterns later identified as the active and inactive patterns, the dashed line showing the mean value of activities. The bold vector is the direction of the first eigenvector of the covariance matrix C. \(h_{i}\), \(h_{j}\) and \(h_{k}\) represent three arbitrarily chosen axis corresponding to different hours i, j and k of the day.