bg
#&gt; 1 -0.004237230      1 1.700487e-05 0.1953197 0.001733801 -0.006777540
#&gt; 2 -0.003998994      1 2.631616e-05 0.2160592 0.001635822 -0.006490719
#&gt;       sigma_bg     sd_bg head2tail_ratio mblrr_slope_pt mblrr_intercept_bg
#&gt; 1 0.0002022220 0.4527011   -0.0007122453  -0.0003719424       -0.006442819
#&gt; 2 0.0002437449 0.4453795   -0.0009850845  -0.0002171012       -0.006274295
#&gt;   mblrr_slope_bg mblrr_cor_bg mblrr_intercept_pt mblrr_cor_pt   polyarea
#&gt; 1    0.001572672    0.9323391