Formula: y_transform ~ x^transform_exp * length * predict2_0(r1, k, d, 
    kmercov, bias, x)

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       1.085e-03  8.244e-02   0.013   0.9895    
r1      1.015e-02  4.056e-03   2.503   0.0124 *  
kmercov 1.266e+02  1.332e+00  95.069  < 2e-16 ***
bias    0.000e+00  2.962e-01   0.000   1.0000    
length  9.763e+05  1.661e+05   5.876  4.9e-09 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 3190000 on 1995 degrees of freedom

Number of iterations to convergence: 23 
Achieved convergence tolerance: 1.49e-08