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  1.284e+01   0.000    1.000    
r1      2.277e-01  1.055e+02   0.002    0.998    
kmercov 2.550e+02  2.912e+00  87.551   <2e-16 ***
bias    0.000e+00  3.572e-01   0.000    1.000    
length  3.214e+04  4.073e+05   0.079    0.937    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 279200 on 1995 degrees of freedom

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