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  3.710e-01   0.000 1.000000    
r1      8.617e-02  6.103e-02   1.412 0.158120    
kmercov 2.536e+02  2.832e+00  89.558  < 2e-16 ***
bias    0.000e+00  3.522e-01   0.000 1.000000    
length  3.821e+04  1.089e+04   3.508 0.000462 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 280900 on 1995 degrees of freedom

Number of iterations to convergence: 25 
Achieved convergence tolerance: 1.49e-08