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

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       0.000e+00  8.207e-02   0.000   1.0000    
r1      8.911e-03  4.132e-03   2.156   0.0312 *  
kmercov 1.267e+02  1.340e+00  94.515  < 2e-16 ***
bias    0.000e+00  3.262e-01   0.000   1.0000    
length  8.401e+04  1.411e+04   5.953  3.1e-09 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 283100 on 1995 degrees of freedom

Number of iterations to convergence: 24 
Achieved convergence tolerance: 1.49e-08