code: def show_corr(self):
          "Show the parameter correlation matrix with `pwkit.ndshow_gtk3`."
          from .ndshow_gtk3 import view
          d = np.diag(self.covar) ** -0.5
          corr = self.covar * d[np.newaxis,:] * d[:,np.newaxis]
          view(corr, title='Correlation Matrix'f show_corr(self):
          "Show the parameter correlation matrix with `pwkit.ndshow_gtk3`."
          from .ndshow_gtk3 import view
          d = np.diag(self.covar) ** -0.5
          corr = self.covar * d[np.newaxis,:] * d[:,np.newaxis]
          view(corr, title='Correlation Matrix')
docs: Show the parameter correlation matrix with `pwkit.ndshow_gtk3`.