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  1.946e+00   0.000    1.000    
r1      1.570e-01  2.524e+00   0.062    0.950    
kmercov 2.532e+02  2.769e+00  91.455   <2e-16 ***
bias    0.000e+00  3.417e-01   0.000    1.000    
length  4.008e+05  7.205e+05   0.556    0.578    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 3230000 on 1995 degrees of freedom

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