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

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       2.863e-02  4.312e-04   66.39   <2e-16 ***
r1      1.040e-02  3.291e-05  315.91   <2e-16 ***
kmercov 2.216e+01  4.424e-03 5008.85   <2e-16 ***
bias    4.581e-01  2.786e-03  164.42   <2e-16 ***
length  1.065e+08  9.361e+04 1137.81   <2e-16 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 489000 on 1995 degrees of freedom

Number of iterations to convergence: 5 
Achieved convergence tolerance: 1.49e-08