Formula: y_transform ~ x^transform_exp * length * predict1_0(k, d, kmercov, 
    bias, x)

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       0.000e+00  7.226e-02   0.000        1    
kmercov 2.534e+02  2.741e+00  92.464  < 2e-16 ***
bias    0.000e+00  3.348e-01   0.000        1    
length  7.031e+04  1.163e+04   6.047 1.76e-09 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 288300 on 1996 degrees of freedom

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