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

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       2.017e-02  7.676e-02   0.263   0.7928    
r1      6.884e-03  4.135e-03   1.665   0.0962 .  
kmercov 1.267e+02  1.340e+00  94.555  < 2e-16 ***
bias    0.000e+00  3.249e-01   0.000   1.0000    
length  8.126e+04  1.381e+04   5.886 4.63e-09 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 278800 on 1995 degrees of freedom

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